Malicious PDF — malware analysis report

Static analysis result for SHA-256 87d40e340fdb6e58…

MALICIOUS

PDF

53.5 KB Created: 2020-08-05 17:36:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce4dba51af85b91f4ebb094636d357c8 SHA-1: 5e6d6dcedd920af7dd0baafd1f7825dc04cd29e0 SHA-256: 87d40e340fdb6e58452522e8af2c53515fec3c4a14358258e2e226644167cd8b
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to trick users into visiting malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=neoliberalismo+globalizacion+y+alternativas+economicas+pdf In PDF document text
    • http://files.keishamorris.com/uploads/1/3/1/6/131636833/c0058d61a67249.pdfIn PDF document text
    • http://files.stitchesbylynsey.com/uploads/1/3/0/7/130738499/7513939f.pdfIn PDF document text
    • http://files.ponyselectbaseball.org/uploads/1/3/2/3/132303170/sesobera_xobiju_nixefuzotezop.pdfIn PDF document text
    • http://files.pepsqually.com/uploads/1/3/1/4/131438397/sawepexaw-gekat-govevaxawo.pdfIn PDF document text
    • http://files.nmsuchristianchallenge.org/uploads/1/3/1/3/131381555/larekuloxajofel-vefuxige-webemada.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/1/0434/8136/6693/files/jeroginupetadufok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/sixorobowidufarip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/55939948055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9385/9231/files/mcc_codes_usmc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2789/8268/files/15961733694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/movome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5102/3526/files/nesarevozafigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/51267174134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4373/3154/files/minecraft_ps4_seed_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xasojikunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/3293096481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/17433357589.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C37 5796 bytes
SHA-256: c7ed896f28e95ed41827a26bd5d8464d210b2ce3dd404a5b72348b03fdf40ff8
font_01_sfnt_off00009ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF7 11736 bytes
SHA-256: a431b3056e3c90852ea7e6fbecbba1f5f125567364527e88a1f8e2c1cb38fff8