Malicious PDF — malware analysis report

Static analysis result for SHA-256 7011b0c959a8b9bc…

MALICIOUS

PDF

133.8 KB Created: 2020-10-26 21:16:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f46f39d65b0b0f15bd22fcbd9f733115 SHA-1: e9952ee11efdd74b0d57a49141fe8df713648ee9 SHA-256: 7011b0c959a8b9bc2e2fa7b5286341ee6ab35c2deedc6049159a4ca644dfd42a
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is part of a link farm designed to distribute malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious redirector and the SEO link farm strategy suggest an attempt to lure users to a compromised site for further exploitation.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=page+45+of+1984+george+orwell In PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/728af.pdfIn PDF document text
    • https://fewaxozane.weebly.com/uploads/1/3/4/3/134341296/telugumaf.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/bivapinoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379846/normal_5f8fcd41748fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f8d1fb56e982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374839/normal_5f901e1ecf788.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f893cb180347.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f94714c685fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b2add06-bf1a-43d6-a092-822da4ef5952/balinugol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d10bc7e2-5140-41e6-ac2e-efe542addc30/zuguk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f7b845a-46e5-4c77-84ef-f31f4693b6e4/read_jojo_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b475fb74-9222-4b39-9691-4f7d6ec5a893/zutefixoxafagomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8812/4830/files/3583801628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1262/8902/files/scribble_animation_effect_pro_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8694/7523/files/99461471150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/fidazebuteresesawixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1924/2152/files/94428486258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4347/7909/files/ports_of_oman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9155/8551/files/android_vulnerability_scanner_kali_linux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0586/9208/files/zofapeberejirexawur.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001d0ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1D0EE 31440 bytes
SHA-256: 74f07c15546336751478c98c0b7156e75bd5e3111ddc0967e6297c866c7b7a1d
font_00_sfnt_off0001974c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1974C 5464 bytes
SHA-256: 2c909bdba516bce38a185e944b4e7cd3f8bd0f39cc6a245d933a4568b13b3550
font_01_sfnt_off0001aa16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA16 11616 bytes
SHA-256: b5898ee704b1dfe7a6257079269626901d0222558d6091518e5554ad6053fb4d