Malicious PDF — malware analysis report

Static analysis result for SHA-256 087a66006bb7f7d2…

MALICIOUS

PDF

46.8 KB Created: 2020-08-14 10:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1ea4a79f1634addfd37aaa0dd0129887 SHA-1: 54f49bd0ef2bd18aff08e89d1759992c5d0fb321 SHA-256: 087a66006bb7f7d2bdeacdfeb23010f40d1bee041d54cdef4e482e4fdc19a2f3
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one prominently featuring a redirector URL that is flagged as malicious. The document body, though obfuscated, contains text related to 'validity formal logic definition' and a URL that appears to be part of a link farm designed to attract traffic. The presence of numerous external links, including those pointing to Shopify and other file-hosting services, suggests an attempt to distribute further content or redirect users to malicious sites.

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/pify?keyword=validity+formal+logic+definition In PDF document text
    • http://nikiki.outbackequines.com/uploads/1/3/2/6/132681066/wivovin_faposakak_rufiwurapet_pufetojurozani.pdfIn PDF document text
    • http://files.talentrisecorp.com/uploads/1/3/0/7/130739227/f25304800d28.pdfIn PDF document text
    • http://files.customer1stelectrics.com/uploads/1/3/1/6/131606360/446283.pdfIn PDF document text
    • http://files.shoshonearts.com/uploads/1/3/1/8/131856380/rusudezan.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/1/0431/7482/2044/files/25105254603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/12018842228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0777/4618/files/hp_scanjet_5590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/suzefigizotegizosuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/56295425644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7751/5929/files/84572389177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/c_format_specifiers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7873/0403/files/business_plan_pizza_restaurant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9602/1919/files/atkins_physical_chemistry_9th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/lorikazevesofowowowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2735/6056/files/28004987122.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000613a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613A 5228 bytes
SHA-256: d3e2f9b95b397f855dd9d35fca26713c680d63543e1d18fd4a9e9f08ad87edac
font_01_sfnt_off000072f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F7 10432 bytes
SHA-256: b1afd3bf4a6196999026ac175562ab1e9342207cee73955938f774eabf7f0c93
font_02_sfnt_off000096aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96AA 16544 bytes
SHA-256: ae30e226a556fd8a33cbf3808d7fa8c4044c29860c01e95d7f28b80a77fb4fd5