Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af16eb3946a91f5…

MALICIOUS

PDF

117.7 KB Created: 2020-09-10 19:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 549200a5c0fdde425ad5ff0c46a0abf2 SHA-1: 1bae15670690405de3bef04f9278c9e40ddaea80 SHA-256: 0af16eb3946a91f5c87cabdd40800bedb09e43b3824167e03b25d72303a1877a
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a malicious redirector and part of a link farm, designed to trick users into downloading further malicious content. The embedded URL `https://ttraff.cc/wb?keyword=devocional%20manantiales%20en%20el%20desierto%20pdf` is a known malicious redirector. The ML classifier also strongly indicated maliciousness.

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.cc/wb?keyword=devocional%20manantiales%20en%20el%20desierto%20pdf In PDF document text
    • http://files.runeatrepeatnyc.com/uploads/1/3/2/6/132695805/5611101.pdfIn PDF document text
    • http://files.eatmeh3.org/uploads/1/3/1/4/131482937/8208814.pdfIn PDF document text
    • http://files.perfectpartycakes.com/uploads/1/3/2/6/132683137/raneribip_pefafajapebos_sadoz.pdfIn PDF document text
    • http://files.allisonlbaird.com/uploads/1/3/1/3/131379174/venedufewudi_xomotaz_tepapikumideluw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/fe0276_06c05c2df6d141f688fa53a6979cd151.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/96768c_de08b913c9e446ca808de0c38205229e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3cb6cb_db6f2ecccb8d4805adcbbed7bc7c7ff7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7996/6628/files/jonatix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3032/3101/files/zaxuloretofizim.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0582e0_41752575564b4717ae6a2fd983123222.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fe0276_e3790111cafe48dbbd8baaae840c9b1f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/db1da1_d5c67692b74840abaac0c132311c4487.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_off00018e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E20 5360 bytes
SHA-256: aecbde494aa2b7823244ba0ae24eb265673ea70d22c212c424fdfbf5b5e2dcff
font_01_sfnt_off0001a04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A04D 12344 bytes
SHA-256: 1e793fd62d7cecea5919bee5fc379ed72650c5750d83b552c5cf0d1e7ef8c3f6