Malicious PDF — malware analysis report

Static analysis result for SHA-256 3371e75dfdd5788e…

MALICIOUS

PDF

77.8 KB Created: 2020-10-28 12:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8fd0907f26a0cee3d9a80c76f23a9dd SHA-1: 1128ee4d1059196537f8a51c7023a940172cc4f4 SHA-256: 3371e75dfdd5788e9b0f4753600b4c2fbdc5abaeea6e21c09b4f281cb4fed58e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic identifying it as a link farm or redirector. One URL, 'https://ggtraff.ru/strik?keyword=genius+the+transgression+crossover', is flagged as malicious. The ML classifier also strongly indicates maliciousness. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to lure users to malicious content or manipulate search engine rankings.

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=genius+the+transgression+crossover
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/xipokovuju.pdf
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/woxuma.pdf
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/sudurilut-jepite.pdf
    • https://cdn-cms.f-static.net/uploads/4402250/normal_5f9606214da08.pdf
    • https://cdn-cms.f-static.net/uploads/4418981/normal_5f967912f24a7.pdf
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/ed9a4acdab53.pdf
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/e5bcd2697.pdf
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/0e8febb8e5.pdf
    • https://cdn-cms.f-static.net/uploads/4367938/normal_5f8a0268ef500.pdf
    • https://sitizoxibe.weebly.com/uploads/1/3/4/3/134317871/a5e8a0d.pdf
    • https://wodedofa.weebly.com/uploads/1/3/4/3/134320626/muduzopasegane-fepama-pidurut-xinadefola.pdf
    • https://cdn-cms.f-static.net/uploads/4402032/normal_5f908c599d4b0.pdf
    • https://nometiru.weebly.com/uploads/1/3/4/3/134379396/jikewawapone.pdf
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/wesitelabupi-tejamogijunu-lakokimebu-jinemupokuxe.pdf
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/4c8650d8e0c14.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0478/2702/6079/files/67170171609.pdf
    • https://uploads.strikinglycdn.com/files/e59bf3ea-2c98-4ee4-b2a4-d03e9141a3a8/ruloduziwozefurowog.pdf
    • https://uploads.strikinglycdn.com/files/8aaa398b-4640-42da-9d96-9c03e3e16f0d/20325943036.pdf
    • https://uploads.strikinglycdn.com/files/9f6ee24a-f4a3-49dc-a742-9c7a3a4c86d9/58856884552.pdf
    • https://cdn.shopify.com/s/files/1/0266/9789/2030/files/concord_cafe_menu_concord_ga.pdf
    • https://uploads.strikinglycdn.com/files/e4e3f0d8-d398-4350-892a-a27559ff5104/daxak.pdf
    • https://uploads.strikinglycdn.com/files/6fba9ffd-b406-46e5-bfc7-fe9099a6431a/95623015483.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2b2.bin
d684eb8389dd08ed456f74ac1879a664892bac457487e7ccc6a34c42f2d38e37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B2 5120 bytes
font_01_sfnt_off00010425.bin
a94528136b5c1bdb415067acf461a74ecb59696960e1e22f0136fac0843604e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10425 10380 bytes

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