Malicious PDF — malware analysis report

Static analysis result for SHA-256 546c29864fe81e3b…

MALICIOUS

PDF

64.5 KB Created: 2020-08-03 06:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efbf3e36b89096dcd25b5485f2be8a34 SHA-1: 4119b55ce89d72cd1a67383a0298cef1c46db72a SHA-256: 546c29864fe81e3b7217f9a2869af56d2c464b938af416726f37712b82c6fd76
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector service, 'ttraff.cc', which is likely used to obscure the final destination of the attack. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify-hosted PDFs, suggesting a tactic to generate traffic or distribute content. The document body contains text related to a resume, likely a lure.

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=new+grad+rn+resume+with+no+experience
    • http://files.sheltiesalberta.com/uploads/1/3/1/1/131163634/469826fc.pdf
    • http://files.missionviejoclassic.com/uploads/1/3/0/9/130969384/nogejorav-relamiv.pdf
    • http://files.elspan.com/uploads/1/3/0/8/130874350/cbc6ee.pdf
    • http://files.makeupbytessmiller.com/uploads/1/3/1/8/131856409/ruzewa-morebese-binoram.pdf
    • https://cdn.shopify.com/s/files/1/0430/9044/4445/files/mufudubototuvizenotor.pdf
    • https://cdn.shopify.com/s/files/1/0435/4359/3109/files/88919069190.pdf
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/75197910790.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/jinek.pdf
    • https://cdn.shopify.com/s/files/1/0428/0388/8287/files/lularoe_build_login.pdf
    • https://cdn.shopify.com/s/files/1/0437/9472/7074/files/95658784716.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9690/files/gta_5_online_stunt_jumps.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4449/files/30499125212.pdf
    • https://cdn.shopify.com/s/files/1/0438/7205/9547/files/parojijazojetotowekij.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6551/files/wuvinusitolujak.pdf
    • https://cdn.shopify.com/s/files/1/0428/8439/9270/files/81859554965.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/98738657189.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000d8e3.bin
3edc43d4ba1a42804742afef7466205ac8ef769363a5b0dc8ca7c1515061cf03		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD8E3 18016 bytes
font_00_sfnt_off000097f0.bin
09187cbb3a32651f10644149d319d8bfdb4efb1a516852f2204f7545431ec335		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97F0 5584 bytes
font_01_sfnt_off0000aadb.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAADB 1800 bytes
font_02_sfnt_off0000b369.bin
038b1150c2ce87e01cd62e7aeca2c163903a9d5c88c704236e1c8609512e887f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB369 11124 bytes

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