Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1b8f419a1bfddf…

MALICIOUS

PDF

59.1 KB Created: 2020-10-19 01:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 407fb1bb75cad1df3f5d96dd30080f3d SHA-1: bff5fd255a16c2b7eb8d9e1ac534f8d2f6f7ec3b SHA-256: 3d1b8f419a1bfddfd84dcb87b4bbef6de5fc151f1bc60d0de6bd33bf31415f7a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of numerous external links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to obscure the malicious destination. No scripts were extracted, but the primary malicious behavior is the redirection to the identified malicious URL.

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://ggtraff.ru/strik?keyword=john+coltrane+dear+old+stockholm In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f892833d8730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f88fa5caae9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5f89d62319e2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_5f88f639e9b6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370285/normal_5f89b5ad4da13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379236/normal_5f8cb1dfdee33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_5f8a1e6483ef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f8843241e9a2.pdfIn PDF document text
    • https://s./s.yimg.com/uu/api/res/1.2/GCGYiM-5r-f6CU8sScoRA---B/In 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/1/0481/9756/6616/files/rock_prodigy_training_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8394/6401/files/campbell_hausfeld_paint_sprayer_dh4200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9931/1268/files/84615426431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0234/9736/files/bejewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4008/6933/files/nemamebavonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9392/7081/files/te_de_oregano_brujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3648/7061/files/rustoleum_tub_and_tile_kit_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1113/3599/files/juduwedukeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9095/9264/files/eso_mages_guild_questline_rewards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9200586-2846-4232-acda-ce9ad5828305/98374347969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6524b6d8-cb8e-4893-a38a-960aebca4d3e/30024610263.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_off000082f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F8 5232 bytes
SHA-256: eb28e4e21a647a4d9284a80c7220032abc9077ac5bf08114e5dad46012983b6d
font_01_sfnt_off0000948c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x948C 17208 bytes
SHA-256: 86bd598afebe514bb836d3ea9b6a1e680a07ef04f8b7d029850116e8a83a8d23
font_02_sfnt_off0000c9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A2 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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