Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26e89208a3fd55c…

MALICIOUS

PDF

33.3 KB Created: 2020-08-16 12:38:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bd281657793687419bc08ab82876f96 SHA-1: b30a71644bf15e2f2ee8ed85af42f4452ea9a2f9 SHA-256: c26e89208a3fd55cfa8bc99c6ccdbb2d8472f0e9260de5653634b560c14668aa
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The primary malicious URL identified is https://ttraff.com/pify?keyword=about+your+cancer+information+videos. The document body itself is heavily obfuscated and contains junk data, but the presence of the malicious redirector and the sheer volume of links suggest a link farm or redirection attack. No scripts were extracted from this sample.

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=about+your+cancer+information+videos
    • http://files.maxhamhypnosis.com/uploads/1/3/0/8/130874599/e677462b.pdf
    • http://files.funom.org/uploads/1/3/0/7/130776726/0de7215c405df3.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/apostles_creed_anglican.pdf
    • https://cdn.shopify.com/s/files/1/0440/7105/9608/files/conformation_of_alkanes_and_cycloalkanes.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/buwobojib.pdf
    • https://cdn.shopify.com/s/files/1/0428/2200/8988/files/pa_cdl_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/toefl_sample_test_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/nikumezokaliruzoberazeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/xurubeliv.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/giwapu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8191/5802/files/how_to_initialize_a_git_repository.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/asamblea_general_de_la_onu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5006/files/plant_cell_and_its_organelles.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045dc.bin
7025197006829042cfbb0b01249ceecdbc6ee4de83f5188da381c31b229afbe9
pdf-font-stream PDF embedded font (sfnt) at offset 0x45DC 5428 bytes
font_01_sfnt_off0000583e.bin
afbcc799035d58c496eea9f15914d509f1d36076c0a6a66c10502c5a25a82658
pdf-font-stream PDF embedded font (sfnt) at offset 0x583E 9384 bytes