Malicious PDF — malware analysis report

Static analysis result for SHA-256 022a238d203e1c34…

MALICIOUS

PDF

50.9 KB Created: 2020-10-27 16:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 78e7902c665dd5159354b9ffd4910f8e SHA-1: 2ad4130e2c95f5456e0e2205904ba809163ceb0b SHA-256: 022a238d203e1c3474cdfe43991a4b71f8284d4bf6bf187c2e8fb99142199de2
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ggraff.ru, which is disguised as a game. This indicates a phishing or malware distribution attempt. The presence of numerous other PDF links, many pointing to S3 buckets, suggests a link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly flagged this PDF as malicious.

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=ace+taxi+game In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375340/normal_5f959cbfa791b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371807/normal_5f96892358d5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f874d3a3fbee.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/78292.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/901f4deb4f7.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/8742796.pdfIn PDF document text
    • https://lusekovipe.weebly.com/uploads/1/3/4/2/134234723/0902dd78043dd1.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/4331348.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/8861211.pdfIn PDF document text
    • https://mogoribomos.weebly.com/uploads/1/3/4/2/134266362/lobafugogipar.pdfIn PDF document text
    • https://dadekojulaza.weebly.com/uploads/1/3/4/3/134320805/xowewegevito-gibosukiruju-neguripupun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dorulusof/97734928482.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/befejaloveruj.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/12964625244.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/alternative_investment_fund_managers_directive.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/41793590456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3709/2771/files/destiny_2_how_to_get_whisper_of_the_worm_solo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/9620/4442/files/original_3d_crystal_puzzle_instructions_skull.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6249/2324/files/game_hacker_3.1_apk_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/gafetesivopefijapuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/20433755547.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/house_rent_lease_agreement.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/vubuf.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/dudagokiduwu.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_off00008974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8974 4868 bytes
SHA-256: 96560e959f1f6e34bf3880b1ca27d95758b6a8b3d54f5397e6ae0c981d336351
font_01_sfnt_off000099f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99F7 10648 bytes
SHA-256: 056c1b9dd7d42d0f52e6b90ec095dfe6b24d043633fec2dcfc26e69566291979

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