Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cdb2513598c45fc…

MALICIOUS

PDF

52.9 KB Created: 2020-08-06 05:25:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 988cae9a42e2093d73ecb64a7edf5611 SHA-1: 5ea6acaf225ecad01c773e7390d2c9a21af2c3d7 SHA-256: 5cdb2513598c45fcf0378fceaced2f33f6e0bd50ce50234d14f13dae57b24b4e
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.com) which is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL, suggesting an attempt to trick users into downloading malicious content. The presence of many links to external PDFs, some with numeric slugs, indicates a link farm SEO tactic to improve search engine ranking for malicious content.

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.com/pify?keyword=copernican+revolution+thomas+kuhn+pdf In PDF document text
    • http://masibado.treadweary.com/uploads/1/3/2/6/132681947/setafab.pdfIn PDF document text
    • http://fupala.brightonbannershop.co.uk/uploads/1/3/1/4/131453109/7155503.pdfIn PDF document text
    • http://tadipasid.godlybrandinc.com/uploads/1/3/2/6/132681824/devanizaji.pdfIn PDF document text
    • http://files.gregbgordon.com/uploads/1/3/1/0/131070786/vuvirivugixut_parapom.pdfIn PDF document text
    • http://files.portabletoiletsmichigan.com/uploads/1/3/0/7/130775304/3ed70.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/68525431035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3543/3882/files/biotecnologia_animal_y_vegetal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/32897570410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7294/5304/files/form_g-_325a.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/wikuvebala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/il_barbiere_di_siviglia_libretto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1561/8203/files/10643749017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5221/9030/files/alphabetical_series.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/gepimikavokibepoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8411/1267/files/resident_evil_degeneration_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0736/1703/files/9899907028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3672/8734/files/12th_zoology_practical_manual_2020.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

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9172 5424 bytes
SHA-256: b4091c521e467a9c196154940e357b2622052697be3b728c7b29f8d6637363f7
font_01_sfnt_off0000a3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B3 10076 bytes
SHA-256: 52d290e8e302f9f2f301e72c6651ae35f5b435655370111701900e553b1248df

Open this report in the interactive analyzer, or submit your own file for analysis.