Malicious PDF — malware analysis report

Static analysis result for SHA-256 1271d234e9255049…

MALICIOUS

PDF

39.1 KB Created: 2020-08-12 20:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad0abcecaf64b356b17e86ac04690eef SHA-1: 22bb374b2a13634290b9d5b86d65c2cbb87fdc11 SHA-256: 1271d234e92550494860821b1c1645a6a4e6f43a9977eeb4eb2fafc0ef77e543
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.cc'. The document body, though obfuscated, appears to be a lure related to document manipulation. The presence of embedded links and the redirector strongly suggest an attempt to lead the user to malicious content, likely for phishing or malware distribution.

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/wb?keyword=inserting%20a%20pdf%20into%20a%20word%20document%20mac
    • http://files.idajaneeyelashextensions.com/uploads/1/3/1/4/131438784/5578714.pdf
    • http://files.optimalwellnesslab.com/uploads/1/3/1/4/131454699/9782097.pdf
    • http://podumida.myunfilteredeveryday.com/uploads/1/3/2/6/132681352/xevevo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3487/7847/files/laligitekuta.pdf
    • https://cdn.shopify.com/s/files/1/0432/5471/0427/files/25273448418.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/string_concatenation_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0438/4522/2550/files/migebinafuzilutowobix.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/action_replay_max_ps2_code_list_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/1209/4109/files/sbi_personal_loan_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/52583609445.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6561/files/dotegoxagodoregedobif.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/vamilitub.pdf
    • https://cdn.shopify.com/s/files/1/0438/5597/0454/files/accelerated_learning_crash_course.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005757.bin
7b34c29c891cd3a3bb678c47707a65e48353894cab5f5c492818ea2d5f51fb57
pdf-font-stream PDF embedded font (sfnt) at offset 0x5757 5472 bytes
font_01_sfnt_off000069ec.bin
9cab3d55898d1c2be8290add65feeec66a10bc65bd52e19574df304828cada02
pdf-font-stream PDF embedded font (sfnt) at offset 0x69EC 11536 bytes