Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a67f67bb970eddf…

MALICIOUS

PDF

51.6 KB Created: 2020-10-24 08:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3ed4ad6449ffc87e1facef515509aac SHA-1: 9b1f6b61d69b01983a80100e7aad9ef1a9315834 SHA-256: 2a67f67bb970eddffbaff35afa0f1621b90aae119c1007945c60ffeecaeb9829
174 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/123?keyword=recyclage+bouteille+plastique+pdf
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5f8ccc28b4870.pdf
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f8c5d55ad7cd.pdf
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f87031f470b1.pdf
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f882a9c1c095.pdf
    • https://cdn-cms.f-static.net/uploads/4377717/normal_5f8bbacdb3333.pdf
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f871f8c021a9.pdf
    • https://cdn-cms.f-static.net/uploads/4393916/normal_5f938795342dc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0493/6138/7676/files/insect_morphology_and_systematics_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/8335/0687/files/geospring_water_heater_f20.pdf
    • https://cdn.shopify.com/s/files/1/0431/9074/7295/files/mcgraw_hill_php_complete_reference_download.pdf
    • https://cdn.shopify.com/s/files/1/0501/8697/7441/files/magnus_chase_hammer_of_thor_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6090/3582/files/ap_thesis_statement_formula.pdf
    • https://uploads.strikinglycdn.com/files/c81facd4-d985-4cbe-a570-8075f3820901/ledefozux.pdf
    • https://uploads.strikinglycdn.com/files/6801e7a8-928b-449e-9b9a-6b472cb93bff/poregugedamuzepiwe.pdf
    • https://uploads.strikinglycdn.com/files/2c5c071b-a0c6-4f1f-a2af-49759aac7125/94303529547.pdf
    • https://cdn.shopify.com/s/files/1/0432/5687/3128/files/80229879714.pdf
    • https://cdn.shopify.com/s/files/1/0268/7959/0597/files/52355552897.pdf
    • https://cdn.shopify.com/s/files/1/0483/3709/2771/files/weed_eater_fb25_gas_blower_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4716/files/dragostea_din_tei_translation.pdf
    • https://cdn.shopify.com/s/files/1/0478/8233/8470/files/bear_pride_flag.pdf
    • https://uploads.strikinglycdn.com/files/efd27faa-9a15-4899-9e7f-a1319670ac43/kipolazovurivenigo.pdf
    • https://uploads.strikinglycdn.com/files/04aa294a-237b-44df-9ee6-932534ff88a0/39502319916.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a69.bin
b276a58a48ae9f6ef1d2d911e70afda6e02722272c06f2da48bd331731faba01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A69 5600 bytes
font_01_sfnt_off00007d96.bin
dbd587da17865384f6fe8bbbdab1b0b17e0a8937058716a5cf3d61f43bb15e25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D96 12444 bytes
font_02_sfnt_off0000a588.bin
56bb3ca562e86e3fc3aa6f76f27f1b266368471965d58bec560900111bad0034		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA588 17480 bytes

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