Malicious PDF — malware analysis report

Static analysis result for SHA-256 8140284e5e0bb83d…

MALICIOUS

PDF

72.2 KB Created: 2020-08-23 00:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0ab4aec8c57ada3c6a5ab794e34ac9f8 SHA-1: 48d16badeb76b131f10a06688b49c0396e81ec4e SHA-256: 8140284e5e0bb83de0b56287717a40d553822dbf3b24d79b3d81cd268f7494a1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body text and embedded links suggest a lure for free downloads, a common tactic for phishing or malware distribution. The ML classifier strongly indicates maliciousness, and the presence of multiple SEO-optimized links further supports a malicious intent to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=time+am+pm+ki+full+form In PDF document text
    • http://files.mybluethumb.com/uploads/1/3/0/7/130775350/2d99247.pdfIn PDF document text
    • http://files.parkesautodetailing.com/uploads/1/3/1/8/131856374/73de7231b22.pdfIn PDF document text
    • http://begupu.newwoodturners.org/uploads/1/3/2/7/132740267/zoboregekalamojaba.pdfIn PDF document text
    • http://files.tanawanhandycraft.com/uploads/1/3/0/9/130969061/9083761.pdfIn PDF document text
    • http://jefafot.marriottediting.com/uploads/1/3/1/4/131408899/matelujivili-rejavumuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6540/1753/files/rusetuvuxabomopunitilafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4925/5066/files/raxemalaforim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/33677807583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8341/3142/files/alone_together_sherry_turkle_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/mitosis_questions_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1537/0912/files/58555785002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/kadamban_movie_in_kutty_movies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/gogowesasegusupobiguzef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1970/6279/files/sabagilusibevakonefuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5930/4858/files/xitonewas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8731/2536/files/excel_bedingte_formatierung_komplette_zeile_einfrben.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/rafapekeganiduka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/99503064371.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AC 3896 bytes
SHA-256: 23f582c7dc8e7a43f3f09199624c9ad53997d6cf6d7b84901384a53054ce6035
font_01_sfnt_off0000c271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC271 4580 bytes
SHA-256: 74a33c83e5e65c667db9bc0c49950b0ca5979d080821e4318a5b7479901d0e1b
font_02_sfnt_off0000d1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B9 4784 bytes
SHA-256: 72d9d9b07811deb4d24617f9702a134415f6eec194c8b2ea383df341a16b8a5e
font_03_sfnt_off0000e18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18E 10348 bytes
SHA-256: ce8fd254f199a90d856dca079e89fe4d2af72a17674335b042d0458b722da895
font_04_sfnt_off00010500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10500 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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