Malicious PDF — malware analysis report

Static analysis result for SHA-256 2acbcb166961917d…

MALICIOUS

PDF

73.8 KB Created: 2020-08-07 15:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8fa6a0658a27119fe0b4f61f54b57eef SHA-1: eb976ed41f330d30802f8bb82ec5a8f74e385bc6 SHA-256: 2acbcb166961917d9565d9c3d8c404748c4b882aac19db7b2079a503550d7d35
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary redirector URL being https://ttraff.ru/pify?keyword=bloqueo+av+grados+pdf. This indicates a likely attempt at SEO poisoning or a phishing campaign by distributing numerous links to potentially malicious content. The document body itself is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf.

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=bloqueo+av+grados+pdf In PDF document text
    • http://files.kencot.info/uploads/1/3/1/6/131637649/100a50638a5e3.pdfIn PDF document text
    • http://files.createwithease.com/uploads/1/3/2/6/132682290/f796a44e3e.pdfIn PDF document text
    • http://jutibano.radhikanagpal.org/uploads/1/3/1/1/131163635/nilepolax.pdfIn PDF document text
    • http://files.classroomconversations.org/uploads/1/3/1/3/131379290/dajedixanibu.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/1/0435/1649/3976/files/a_carta_roubada_edgar_allan_poe_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/42836141016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/vugaxixijavekejogix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/kipajida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2661/2378/files/stored_procedure_in_sql_tutorial_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/loneliroronevelamigiwowun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/core_java_black_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4285/5319/files/kukiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8368/5274/files/radulirifujas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3038/8642/files/menosulerus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/atmosphere_shift_chords.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 6

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_off0000e0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BE 5444 bytes
SHA-256: 8f598c4f59904dee2e8f41dfd1568906eb2e1a6a04b0bec96c84de4f67215883
font_01_sfnt_off0000f359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF359 11544 bytes
SHA-256: 3fca8de920094b87ad02a434e5ce5b7db97de04850c585ffaff0d2911b4482e2

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