Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1abb2f82e305ab6…

MALICIOUS

PDF

47.4 KB Created: 2020-08-05 01:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4afeab8ba7eccbec845fcb6847194bf2 SHA-1: 7bc33e76139b92096e681dcce3ca6ef70b752c32 SHA-256: d1abb2f82e305ab6d9b99c4983ebef74956594fe53f20b2797ce2d56f1623111
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, with one prominent link pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the string 'Bsc biology syllabus pdf', suggesting a lure to entice users to click the malicious link. The primary attack pattern involves redirecting the user to malicious infrastructure.

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=bsc+biology+syllabus+pdf In PDF document text
    • http://files.tlswindsled.com/uploads/1/3/0/7/130740127/2549550.pdfIn PDF document text
    • http://files.thecontactlensmuseum.org/uploads/1/3/2/6/132682171/defubexezidujis.pdfIn PDF document text
    • http://numaseti.ljhfoc.com/uploads/1/3/1/3/131383791/nowipurusamoje.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/1/0428/9835/8432/files/3789128943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/70599489638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0809/0535/files/15598410029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/93212150221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3400/2086/files/7140408782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0862/1735/files/basefebun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93616534700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/60463060325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/15276526651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5280/0929/files/nj_6_points_of_id.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/xewepagituvukeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/wavobulovozazido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4131/6249/files/90241880720.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 2

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_off00006f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5E 5520 bytes
SHA-256: 6649c9be844a55003bdfe297303ec5916f25958eb586b4ecf55e21b0b993c058
font_01_sfnt_off00008242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8242 15128 bytes
SHA-256: e5137a0f8ec91704420da53959e02ade9a4e9895ce165f4c7c0e0bc59b7d557b

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