Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c213c585760c31…

MALICIOUS

PDF

42.3 KB Created: 2020-08-20 16:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 630f27c08db30284ede3278e65711604 SHA-1: 0f3c9ebeaf6e17b9edb260791c5df2cbfd376279 SHA-256: 12c213c585760c31be44afd2ce1c1f986e33f21ef45d6c2d28b36d7b7fd260c1
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at "https://ttraff.com/pify?keyword=codecov+report+gitlab". The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to malicious infrastructure. The presence of many links to external PDFs indicates a link farm strategy, likely to improve SEO for malicious content or to distribute further payloads.

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.com/pify?keyword=codecov+report+gitlab
    • http://files.valleyfarm.ca/uploads/1/3/1/4/131454521/9401635.pdf
    • http://files.mccarranferguson.com/uploads/1/3/0/9/130969166/burakijufajawog_padazuxelaze_xenaw_sodudabetexaz.pdf
    • http://files.worldbaseballalliance.org/uploads/1/3/0/7/130738704/tifuxadi.pdf
    • http://files.vancouvermermaid.ca/uploads/1/3/0/7/130776176/85d673715a18205.pdf
    • http://pelikiga.nusense.org/uploads/1/3/1/6/131637649/2755639.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5693/8646/files/force_and_motion_worksheets_for_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0433/5265/3973/files/safogagodelitonesagoli.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/belixodeves.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/zifotebu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72710717911.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/samonumuwi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4780/files/barcelona_metro_map_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/daxatizoluru.pdf
    • https://cdn.shopify.com/s/files/1/0428/8721/7311/files/vamakasigebitelofo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/3276440955.pdf
    • https://cdn.shopify.com/s/files/1/0434/5397/2630/files/25728977614.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_off00006544.bin
0421c2caa8ff340cd033dec6decf02fccae5e4408e646a16a976c77b9a4f0acd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6544 5168 bytes
font_01_sfnt_off000076e4.bin
f3adcc232bf0b979a1f0d633d1c2893d2ae0ac2aad52ffdb905e86c0e939b136		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E4 10908 bytes

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