Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd278f944ced0c6…

MALICIOUS

PDF

45.0 KB Created: 2020-08-04 03:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1a76b61572d4b6a930e5c24b946b971 SHA-1: 6208f42339912b0ebb4cf164bb21038e98ca8e0c SHA-256: 2bd278f944ced0c6f1570dd1fb837a9d3ae426c3989ec02ef41858c6b7f0e430
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link and a large number of external PDF links, suggesting a link farm or redirection tactic. The primary malicious URL, https://ttraff.cc/pify?keyword=career+development+strategies+pdf, is presented within the document body, masquerading as a legitimate resource. The ML classifier strongly indicates maliciousness, and the PDF structure itself is suspicious due to the mass of outbound links.

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=career+development+strategies+pdf
    • http://files.7asidesoccer.ca/uploads/1/3/0/7/130739287/turaxazulilutu-vuwojamuvok-nudogo-jinopuduwim.pdf
    • http://files.j-6forge.com/uploads/1/3/1/3/131380354/mijuwunefi.pdf
    • http://files.portsoy-holiday-cottage.co.uk/uploads/1/3/1/6/131636891/puvoxozuzab-tefom.pdf
    • http://files.krownedbykenyakollection.shop/uploads/1/3/0/7/130738836/desuwa.pdf
    • http://files.r3dband.com/uploads/1/3/0/7/130775395/cc617623fe5a.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/mamelitiwimozavusitiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/83908605773.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0429/9892/3427/files/40829885514.pdf
    • https://cdn.shopify.com/s/files/1/0435/2986/3323/files/lance_travel_trailer_reviews.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdf
    • https://cdn.shopify.com/s/files/1/0440/6480/0918/files/49342823537.pdf
    • https://cdn.shopify.com/s/files/1/0433/5039/2984/files/27925473959.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/alamo_drafthouse_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/xasimuzefemubo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51906755497.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9833/files/zeserarokidawuju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9966/9151/files/36179739638.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_off00007328.bin
e3a3c2ab2cd24ad2ec96fa86e19aa1795e97f95cea493545dccdeb6581a6c2a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7328 5324 bytes
font_01_sfnt_off00008539.bin
c952294ced41deb3a96b067e0c764cd3a34296c7563ecaf60b3aa45f8347ba1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8539 9792 bytes

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