Malicious PDF — malware analysis report

Static analysis result for SHA-256 be91ab995a57dc78…

MALICIOUS

PDF

34.0 KB Created: 2020-08-06 23:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 37f1c3c36a64af5a6a0b73bc3c4da3f4 SHA-1: 2e022ef5cfcc7ff41d128faa5e36d3aafa0ff30d SHA-256: be91ab995a57dc7838d9137743ab5b16ed6e6cbee47ff030b9e80a34279a7ac2
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically `https://ttraff.com/pify?keyword=cambridge+igcse+biology+workbook+answers+dave+hayward+pdf`. This indicates a phishing or scam attempt, leveraging search engine optimization techniques to distribute malicious links. The ML classifier strongly supports the malicious nature of this PDF.

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=cambridge+igcse+biology+workbook+answers+dave+hayward+pdf In PDF document text
    • http://files.sanfrancisco-carpenter.com/uploads/1/3/1/6/131637679/a79c9.pdfIn PDF document text
    • http://files.jlraskin.net/uploads/1/3/1/4/131437977/pavuned_wovofupepefom_tedazitesadumet.pdfIn PDF document text
    • http://files.gorenje.ph/uploads/1/3/1/8/131871970/6654912.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/1/0431/7039/8357/files/tilarepimivufulabadike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2596/4957/files/31772196168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0459/1254/files/kodajalevinakakedod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5903/3752/files/19146089960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4711/5157/files/cartello_divieto_di_sosta_da_stampare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/denofawumajezoxowevilalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3775/3501/files/tutefaresodob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2137/5387/files/kitchen_pro_bread_maker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3514/0007/files/my_silver_lining_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6686/5317/files/fotatajejoniz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0349/3022/files/15289571286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3616/3747/files/junuwujabudinokule.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 7

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_off000045f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45F5 5932 bytes
SHA-256: bebdf3c8990d5d74b7776ff73bc929260aa3f098713fcd880a86ac0f23d74e32
font_01_sfnt_off00005a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0E 9576 bytes
SHA-256: fd779f983d254cd0ad0cd3b3298485d263276e5e0a97d501a128eb0fbaf6f2a0

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