Malicious PDF — malware analysis report

Static analysis result for SHA-256 6897cf35aeaba72b…

MALICIOUS

PDF

50.3 KB Created: 2020-08-09 00:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: db2945fd71adf91496740067d7e4aa01 SHA-1: bb4a0d948d7a8d6e8d68198752bbc8bb3d3ee48f SHA-256: 6897cf35aeaba72bc77a3ce1c0c2c7b87939c3b7b25ba7fb1db2eff6afaee141
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests the document is part of a link farm or SEO manipulation scheme designed to drive traffic to malicious infrastructure. The ML classifier also 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://ttraff.ru/pify?keyword=bodyweight+exercises+pdf In PDF document text
    • http://files.aprenderyaonline.com/uploads/1/3/0/7/130775446/wukibimutatubes_jupimixuzura_wupisake_ritiwotatemilu.pdfIn PDF document text
    • http://files.haddingtongarden.com/uploads/1/3/1/4/131437878/popaledizijizejo.pdfIn PDF document text
    • http://files.victoriayoga.co.uk/uploads/1/3/1/4/131407315/tizabezuretit-nojeso-tagagidilugebom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0269/1743/files/81361892746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4151/1834/files/98799098627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9721/7440/files/66380262915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0490/3073/files/61440788105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0966/2366/files/93449870924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupesuditijativerawepafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0545/2193/files/54535820275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/zejoreponejoraxubugon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/53334098203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/vebosuxijezofovoripibas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4728/1062/files/greek_mythology_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/26403288558.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_off00008617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8617 5484 bytes
SHA-256: d1362496633bb6978e6cb190aae5915b04f3ced55dd33560793f98c3746a8a36
font_01_sfnt_off000098e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98E9 10356 bytes
SHA-256: 0eed7bc87ab83bb39e708cf32043bfeae28c0652eb03cc776b12a6f2325eb5a6

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