Malicious PDF — malware analysis report

Static analysis result for SHA-256 179d977888d7cad0…

MALICIOUS

PDF

47.1 KB Created: 2020-08-22 12:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afca9799628ba9979c61eff08482a3c9 SHA-1: 6a5d27b78209e3ba5ecd89330484d35eb1d95604 SHA-256: 179d977888d7cad00adf5121258518d7d06c62610359c983269dc67ff3c461cb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a template for employee appreciation awards. The document also contains a large number of links to other PDFs hosted on various domains, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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.cc/pify?keyword=employee+appreciation+awards+templates
    • http://kasali.downeasthiker.com/uploads/1/3/1/1/131164573/gadodonopejo_vexakekonezefa.pdf
    • http://files.hillcrestfbla.org/uploads/1/3/2/7/132712661/xemewobina-dogabumude-nitoxevoxu-notuj.pdf
    • http://kekegokar.queersfordinner.com/uploads/1/3/2/3/132302780/1945846.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/1104/6561/files/88622437435.pdf
    • https://cdn.shopify.com/s/files/1/0440/6683/2534/files/time_saver_standards_architectural_design.pdf
    • https://cdn.shopify.com/s/files/1/0440/7876/0088/files/rudram_chamakam_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/symptoms_of_pcos.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/rosod.pdf
    • https://cdn.shopify.com/s/files/1/0439/9045/0334/files/define_annotations.pdf
    • https://cdn.shopify.com/s/files/1/0436/7394/4217/files/offensive_security_certified_professional_complete_self_assessment_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/7787/6377/files/91992815795.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4298/files/vuripolaxifugifusopid.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/error_editing_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/passport_application_forms_uganda.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_off00006ce2.bin
cee75c71d97b51a0f2b173c178b104d172d04037573df9793abe13f04322ff50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE2 5160 bytes
font_01_sfnt_off00007e69.bin
674e5ff398b9afebe4aeab0ecabf09aa55d55bd658eec5f4b9849577139c643f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E69 10304 bytes
font_02_sfnt_off0000a19c.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA19C 4324 bytes

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