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)
MD5: 549200a5c0fdde425ad5ff0c46a0abf2 SHA-1: 1bae15670690405de3bef04f9278c9e40ddaea80 SHA-256: 0af16eb3946a91f5c87cabdd40800bedb09e43b3824167e03b25d72303a1877a
154 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, with a prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the suspicious redirector, suggesting the primary purpose is to direct users to malicious content. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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
    • http://files.runeatrepeatnyc.com/uploads/1/3/2/6/132695805/5611101.pdf
    • http://files.eatmeh3.org/uploads/1/3/1/4/131482937/8208814.pdf
    • http://files.perfectpartycakes.com/uploads/1/3/2/6/132683137/raneribip_pefafajapebos_sadoz.pdf
    • http://files.allisonlbaird.com/uploads/1/3/1/3/131379174/venedufewudi_xomotaz_tepapikumideluw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/fe0276_06c05c2df6d141f688fa53a6979cd151.pdf
    • https://static.usrfiles.com/ugd/96768c_de08b913c9e446ca808de0c38205229e.pdf
    • https://static.usrfiles.com/ugd/3cb6cb_db6f2ecccb8d4805adcbbed7bc7c7ff7.pdf
    • https://cdn.shopify.com/s/files/1/0431/7996/6628/files/jonatix.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3101/files/zaxuloretofizim.pdf
    • https://static.usrfiles.com/ugd/0582e0_41752575564b4717ae6a2fd983123222.pdf
    • https://static.usrfiles.com/ugd/fe0276_e3790111cafe48dbbd8baaae840c9b1f.pdf
    • https://static.usrfiles.com/ugd/db1da1_d5c67692b74840abaac0c132311c4487.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018e20.bin
aecbde494aa2b7823244ba0ae24eb265673ea70d22c212c424fdfbf5b5e2dcff
pdf-font-stream PDF embedded font (sfnt) at offset 0x18E20 5360 bytes
font_01_sfnt_off0001a04d.bin
1e793fd62d7cecea5919bee5fc379ed72650c5750d83b552c5cf0d1e7ef8c3f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A04D 12344 bytes