Malicious PDF — malware analysis report

Static analysis result for SHA-256 135d3321c5119133…

MALICIOUS

PDF

42.5 KB Created: 2020-09-03 13:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1d5b8afa4649ebeb1196f81b4d143e5 SHA-1: e501a79e4e9bf847631b58022136d8e832101dfc SHA-256: 135d3321c5119133b74c96a476d1c427f4b3f0d258e4a5c7c0f052ab5877f383
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=wow+classic+rogue+leveling+guide+alliance', which is also flagged as a malicious redirector. This suggests the primary purpose is to lure users to malicious sites, potentially 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.com/wix?keyword=wow+classic+rogue+leveling+guide+alliance
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/39346728004.pdf
    • https://cdn.shopify.com/s/files/1/0435/7442/7811/files/52031854609.pdf
    • https://cdn.shopify.com/s/files/1/0436/4225/7561/files/application_letter_for_any_position_without_experience.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/62701940015.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/common_interview_questions_for_teachers.pdf
    • https://cdn.shopify.com/s/files/1/0434/0429/6348/files/atorvastatin_metformin_fixed_dose_combination.pdf
    • https://static.usrfiles.com/ugd/2f7489_0df6e8408ab64791809a187aa94f8551.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_3cc7ed932e7040589430a17d563a5a2d.pdf
    • https://static.usrfiles.com/ugd/510a18_3b205c4f4b464e7795b43f17e9cb7a86.pdf
    • https://static.usrfiles.com/ugd/efb3f0_be0cc2ddbec34fdea693604bf76058ab.pdf
    • https://cdn.shopify.com/s/files/1/0459/0102/1338/files/chopin_piano_nocturne_20_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0436/0926/0190/files/38525089611.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_off00006739.bin
508afeef45a1377a2cddade2fe6ce8a4cbfb63d89ede105888a758af0cd49ef4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6739 5272 bytes
font_01_sfnt_off00007953.bin
6a8bc9529729bd344aed8fc0676be9f41ba92ea0709d51be531997753ba8faed
pdf-font-stream PDF embedded font (sfnt) at offset 0x7953 10716 bytes