Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7c7c98bdecb214…

MALICIOUS

PDF

54.3 KB Created: 2020-10-31 06:34:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4240de48f4b224f15b9ad2f125dfb9f SHA-1: 1df142340a3d608a729e95fed5d30af16d9aa80b SHA-256: cc7c7c98bdecb214b91b785c0e6c3d4e40249dce35f9f0d158310f240b5e2588
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, contains a reference to this same URL, suggesting it's the intended destination. The presence of numerous other PDF links, many pointing to benign content, indicates a potential link farm or SEO manipulation tactic to disguise the malicious redirect.

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/aws?keyword=lord+of+the+rings+elrond+age
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/zegewuzaguduk-nuxewuraba-mebikejexem.pdf
    • https://galebekamabe.weebly.com/uploads/1/3/4/3/134305591/lesusafeb-vikelibowi-xoreborexaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0502/9865/0797/files/importance_of_education_in_urdu.pdf
    • https://s3.amazonaws.com/zurovajij/gegelonosabofozifekajom.pdf
    • https://cdn.shopify.com/s/files/1/0498/7207/6961/files/96204175789.pdf
    • https://cdn.shopify.com/s/files/1/0480/0613/5961/files/2139986404.pdf
    • https://uploads.strikinglycdn.com/files/82f10e41-3b92-41f9-a3cf-f1ce213c3ae5/74222881796.pdf
    • https://s3.amazonaws.com/wofaxil/buyers_and_cellars_quest_guide_rs3.pdf
    • https://uploads.strikinglycdn.com/files/4d1758fb-f301-4e20-ade6-1501d7abb6b1/39521474126.pdf
    • https://uploads.strikinglycdn.com/files/fd1319ec-736a-4521-945d-c0b80797f6d2/kodak_preps_7_user_guide.pdf
    • https://uploads.strikinglycdn.com/files/949fae9c-658c-418c-87e3-8209bed8ae89/fulufepujowuzozose.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000088cc.bin
723c7b284d01a6b9658092d0c092de5a1eaa630330ecbf995f80ed5f3c9e1056
pdf-font-stream PDF embedded font (sfnt) at offset 0x88CC 4900 bytes
font_01_sfnt_off0000996d.bin
7da9dc043dfe08adc0543e84882c3f5abbb1fbc356a6c5d53e93948bca292c8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x996D 11052 bytes
font_02_sfnt_off0000be7d.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE7D 4324 bytes