Malicious PDF — malware analysis report

Static analysis result for SHA-256 c501e56227c6cf61…

MALICIOUS

PDF

46.4 KB Created: 2020-08-06 12:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cead895cc008a51f28fe1fb2f43f5dc9 SHA-1: 13fed7137cfbfbd033c8c8507f4e395086446bb3 SHA-256: c501e56227c6cf619b7a02c3cce4cb43fecdc1d04ba8e0ced43852c0d31c180c
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a link to known malicious redirector infrastructure at 'ttraff.com'. Another critical heuristic identified a PDF link farm, suggesting an attempt to distribute or obscure malicious content through multiple external links. The ML classifier also 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.com/wb?keyword=ethical%20dilemmas%20thesis%20pdf
    • http://files.sallychinea.com/uploads/1/3/0/7/130740524/cf4ee67.pdf
    • http://romepoxeb.celticknot1000.com/uploads/1/3/0/7/130776487/1478754.pdf
    • http://files.hackneykeepournhspublic.org/uploads/1/3/0/9/130969580/giwiviketi-pizoregil.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/mavomofepupekixorilubidu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2351/3238/files/jedavosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2761/files/piwodamidebafez.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/gutalu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/6734784262.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mijafovaginidobu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4471/6199/files/nenebazoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6987/files/39053240248.pdf
    • https://cdn.shopify.com/s/files/1/0437/1152/9114/files/jifubovobobute.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/58807591311.pdf
    • https://cdn.shopify.com/s/files/1/0436/4258/5241/files/grille_des_accords_guitare.pdf
    • https://cdn.shopify.com/s/files/1/0430/0560/8099/files/hp_laser_jet_p3005_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3941/files/tuvawojogakenapot.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_off00007997.bin
52ef93ee8ec30112d82aebdb72f0246e42353a6a0607cd456d811f329649dd21
pdf-font-stream PDF embedded font (sfnt) at offset 0x7997 5256 bytes
font_01_sfnt_off00008b58.bin
ff817289efe147c126bb9b74be127621ba6feab5c4b302c2152324d7003cb8ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B58 9800 bytes