Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a8b0ad471e0acd…

MALICIOUS

PDF

32.9 KB Created: 2020-08-24 06:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d024a5f8f0d4bfc5d58d422ae3107771 SHA-1: fd03c8ab24676f0eeaca96fe817d0c31b6c2cacf SHA-256: 14a8b0ad471e0acd16bc312ee522e42a8ea0516268db670549d00d601fe157d4
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for online games, and the embedded links also point to various PDF files, some of which are benign. The primary malicious intent appears to be directing users to the ttraff.ru domain, likely for further exploitation or phishing.

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.ru/pify?keyword=candy+crush+online+games+free
    • http://files.evolvenowinc.com/uploads/1/3/1/6/131636792/gojol-foxubekuvanogi-xojikamotefefuv.pdf
    • http://jejoxosig.leannwiggins.com/uploads/1/3/0/8/130814423/038a6883b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/7232/9630/files/p90x_workout_routine.pdf
    • https://cdn.shopify.com/s/files/1/0430/1081/8201/files/dissolution_bioavailability_and_bioequivalence_abdou.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/20910600889.pdf
    • https://cdn.shopify.com/s/files/1/0436/4664/8473/files/authorship_of_pentateuch.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1362/files/bts_wallpaper_hd_2018.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/44483388386.pdf
    • https://cdn.shopify.com/s/files/1/0438/1540/3682/files/reading_and_writing_skills_curriculum_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/6435/1130/files/dijakarovubakizalabafijud.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/nigiruzokekuwuparajax.pdf
    • https://cdn.shopify.com/s/files/1/0432/3157/6231/files/aplastic_anemia_in_pregnancy.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_off000043e7.bin
87ef910a700d21020fe36d75ca6e4d2f2bddc8614c4b921181ab299550b369e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x43E7 5444 bytes
font_01_sfnt_off00005643.bin
f2244cf36cbd594c7013313a568b0701999e2e86e51133ee42a64bffe1686bfa
pdf-font-stream PDF embedded font (sfnt) at offset 0x5643 9624 bytes