Malicious PDF — malware analysis report

Static analysis result for SHA-256 8390f2b3cf1fde43…

MALICIOUS

PDF

177.7 KB Created: 2020-08-18 22:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 159391459240fc951e558c7b8de5f807 SHA-1: f1589ffd65dbad1784372e45e630c677ea5b80a0 SHA-256: 8390f2b3cf1fde436518f1b4951ef47009df1a3eec9e8db3b25e7f07af775fd7
134 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a redirector at 'ttraff.ru'. This is further supported by a high-confidence ML classifier flagging the PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting a phishing or scam attempt to trick users into downloading further malware or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

Heuristics 4

  • 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.
  • 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=aparichitudu+cinema+songs In PDF document text
    • http://kulaju.ballardbanjers.com/uploads/1/3/1/3/131398540/634ed2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/english_to_urdu_vocabulary_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2739/7797/files/si_joint_stretches.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/26789722552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/29529541313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6767/0689/files/committee_meeting_notice_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/4191940244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/87151902173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/5815185758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3296/1443/files/vegarufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4052/8792/files/fixifajajutaresabebune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0149/4179/files/html_to_javascript.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00021e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21E93 5328 bytes
SHA-256: 8677f9b8e7a180ba64b1087708eca898f33073d8eb0a51503191550c965fb411
font_01_sfnt_off00023074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23074 11288 bytes
SHA-256: 19332c948c032299046802407d5d4ab3990c6946b0936b3e34b9d8c30e99cd77
font_02_sfnt_off00024dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24DAE 16028 bytes
SHA-256: 508869ad2beceb3a64e2523255069d13da9e4d0e9ee38dbfc24254bb99de19fa
font_03_sfnt_off00027fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27FDC 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8
font_04_sfnt_off000294f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x294F5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
font_05_sfnt_off0002a2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A2F6 5968 bytes
SHA-256: 20066f44af4142f2c8678e4976c446682a737d37bfdea8351324ed6004fc5bab

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