Malicious PDF — malware analysis report

Static analysis result for SHA-256 6318913ce1f17f53…

MALICIOUS

PDF

60.0 KB Created: 2020-08-26 02:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec64204f2f865593c3296527b02123d8 SHA-1: 8959491b5b57f22124699729f0e6a79c7b33abf3 SHA-256: 6318913ce1f17f53276e4af735dd4139fb4ca590087774384e4f83e6ece54e53
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector, which is designed to lead users to potentially harmful content. The document body and embedded links suggest a lure for downloading a service manual, which is a common tactic for phishing or malware distribution. The ML classifier strongly indicated maliciousness.

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=cummins+m11+service+manual+free+down
    • http://merezajod.mathzaptutoring.com/uploads/1/3/1/4/131452883/godevevesodumisu.pdf
    • http://files.floridatestadmin.com/uploads/1/3/1/8/131856247/392845.pdf
    • http://files.theyogavoice.com/uploads/1/3/1/6/131637306/pufinimedere-depurimezom.pdf
    • http://files.roselischool.org/uploads/1/3/1/3/131382243/9082655.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/7125/8278/files/adobe_premiere_cracked.pdf
    • https://cdn.shopify.com/s/files/1/0439/2029/4043/files/11846609885.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8236/files/vaccine_adjuvants.pdf
    • https://cdn.shopify.com/s/files/1/0432/8433/2710/files/minecraft_pe_ids.pdf
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/sedra_smith_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/9542/5191/files/ccna_voice_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/rawajajuwekegipaj.pdf
    • https://cdn.shopify.com/s/files/1/0438/8657/5771/files/geode_invitation_templates.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9575/files/4448093551.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_off0000988c.bin
ccf940b92a24e6ec347f2d1e2ae7a2851b748b331e89cdf091b24e3c0411f4d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x988C 5196 bytes
font_01_sfnt_off0000aa29.bin
807d9bd20cf09c72da68d51aaa409c5996d3a7fdc601083ce735b3c07c3eab98
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA29 13484 bytes
font_02_sfnt_off0000d478.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD478 4324 bytes