Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac32011a2c5f231b…

MALICIOUS

PDF

44.4 KB Created: 2020-10-06 14:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6c24b194d989bbe0f0294b5997d9d5c9 SHA-1: b302efcd3f04640ff94a07c134e99787160dab3d SHA-256: ac32011a2c5f231b1031bc9914e2d0bf77bb2e41cdf532c0dc6ed901e9d48684
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying one as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://gettraff.ru/strik?keyword=4th+step+steer+your+relationships', which is also flagged as malicious. The presence of a large number of links, many pointing to benign Shopify URLs, suggests a link farm or SEO manipulation tactic to disguise the malicious redirector.

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://gettraff.ru/strik?keyword=4th+step+steer+your+relationships In PDF document text
    • http://files.photographybyjohnholliger.net/uploads/1/3/2/8/132814476/180636.pdfIn PDF document text
    • http://files.ambersnaturalnutrition.com/uploads/1/3/1/4/131455722/2a141c77c.pdfIn PDF document text
    • http://juviv.wppsfete.com.au/uploads/1/3/0/8/130814328/1a6f27d8f94.pdfIn PDF document text
    • http://files.shadowridgeband.org/uploads/1/3/1/3/131381480/5b5f2.pdfIn PDF document text
    • http://files.jordanplevnes.net/uploads/1/3/1/4/131482832/mefoko-risotuz-dujepi.pdfIn PDF document text
    • http://xikuvove.dvstash.com/uploads/1/3/1/4/131406121/lidufexene_sunojazime_xozanux.pdfIn PDF document text
    • http://files.in2yogalapeer.com/uploads/1/3/1/4/131437225/likezi_fiwilutod_towefibusu_rematakezuzuv.pdfIn PDF document text
    • http://fibixud.cottage11.com/uploads/1/3/1/0/131070487/3602549.pdfIn PDF document text
    • http://files.crystalclearings.com/uploads/1/3/1/3/131380564/zokalopexo_vawezop_fukasuwimu_nesalogoki.pdfIn PDF document text
    • http://sutef.bellinfischer.de/uploads/1/3/2/7/132712019/3144467.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/1/0430/0157/7625/files/past_simple_vs_past_continuous_exercises_islcollective.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7746/8327/files/wukunuxijok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3080/6679/files/what_is_poh_in_destiny_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1716/9819/files/area_code_9872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d91dacea-20a8-4bb6-a9cc-8a50e294a03a/99484794284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f61b9eac-2bb9-42b7-8d2e-5459fd55ead7/67987889168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dedb821-fe3a-4817-83ae-ee1fc7892e53/53545004103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2479868-7ce7-49cb-a25b-bf899cd42ed5/30918074645.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_off00006e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E77 5000 bytes
SHA-256: 54a2a986e0958fc0a0ba29f6db0f112bbc558326defe32d3ed1d1a82a15db69e
font_01_sfnt_off00007f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F77 11076 bytes
SHA-256: dcada97f356f720e9dae5fe92bc28c395cacd0717d37b9ae875d01e5e79b598d

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