Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc17f2f402d95a2…

MALICIOUS

PDF

42.6 KB Created: 2020-11-03 07:47:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7c4938c83cf595a32a6190599dcc48cb SHA-1: 17f09be087c905a8630de1aca7330494c836da4a SHA-256: 1bc17f2f402d95a29d5173c44bb28618cfd674cd096353ac77ae604326e9f7b4
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to known malicious redirector infrastructure at `https://gettraff.ru/aws?keyword=sanyo+58+inch+tv+dp58d33+repair+manual`. The document body and heuristics indicate a link farm strategy, likely for SEO spam or to direct users to malicious sites. No scripts were extracted, but the embedded URLs and the PDF structure strongly suggest a malicious intent to redirect users.

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/aws?keyword=sanyo+58+inch+tv+dp58d33+repair+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f8975f1b09f5.pdfIn PDF document text
    • https://dapujevubo.weebly.com/uploads/1/3/1/4/131438680/712813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5f9ea3f65faee.pdfIn PDF document text
    • https://zozesikijep.weebly.com/uploads/1/3/4/5/134586683/ruxek.pdfIn PDF document text
    • https://bakigimos.weebly.com/uploads/1/3/4/3/134322269/fabigelisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369928/normal_5f8e94b197f89.pdfIn PDF document text
    • https://wavutokemik.weebly.com/uploads/1/3/4/3/134309613/levedobirikoz-zipofepigagob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_5f962eae74a1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_5f959e14a1264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382784/normal_5f93cb86886dc.pdfIn PDF document text
    • https://kiteginizi.weebly.com/uploads/1/3/1/8/131871518/rejuboxirevaxotam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5857 5764 bytes
SHA-256: 561d0c78e5533d05ad4075be7bf0ba76aa9fa2e8006900f63e895dd52cc4c0ff
font_01_sfnt_off00006bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC7 10468 bytes
SHA-256: 26f37cab17a3cbde33c863b5d06b93cbcd6c011e5301f3b41b3ca5417ed60f8f
font_02_sfnt_off00008fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA5 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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