Malicious PDF — malware analysis report

Static analysis result for SHA-256 877ef35258062314…

MALICIOUS

PDF

33.6 KB Created: 2020-08-10 06:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7ce58efc0ff3b3f15ec4e9bdd7bc96ba SHA-1: df4a655373a015ed03000b804304e0604b167aa4 SHA-256: 877ef352580623148dfdcd2e3978507f4c9267a601c52d41f9e1854a7c0d44b8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://ttraff.ru/pify?keyword=alcatel+u5+manual+pdf. This technique is often used for phishing or distributing further malware. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing lure.

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=alcatel+u5+manual+pdf In PDF document text
    • http://files.judithmcosta.com/uploads/1/3/1/4/131437983/4a947cc6a44.pdfIn PDF document text
    • http://files.rotterdamenglishspeakingtheatre.nl/uploads/1/3/2/8/132814343/4064905.pdfIn PDF document text
    • http://files.smithfieldarts.com/uploads/1/3/0/8/130874370/mudidosawukapif.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/1/0440/2728/1558/files/42962500141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0482/9602/files/tefapupupenopuwiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/37347871065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/15594179446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6505/files/how_to_install_opencv_on_raspberry_pi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1161/8462/files/footprints_in_the_sand_poem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/39789244357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5144/9504/files/pojixulerufabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/najurixuginasolizazaxedon.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 8

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_off00004672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4672 5140 bytes
SHA-256: 336c0a3fc5feb94bb1b9238450f9c88e99d19490af4dc925466a0da9c4b2fd1b
font_01_sfnt_off000057e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57E9 10072 bytes
SHA-256: c36de6ff5576474480b5b442fc68bc34280410cda9fd76ae838b2ab0146bddee

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