Malicious PDF — malware analysis report

Static analysis result for SHA-256 1467a155833ab1de…

MALICIOUS

PDF

41.1 KB Created: 2020-08-02 13:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa9450545309e6ff07008b94b2bc5915 SHA-1: 55915b6cf30c653f81cbda5ff4425b75b2fe9c1b SHA-256: 1467a155833ab1de30e719606f7c91fc6bd257043b108271fedae9e4d5304af8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to a link farm designed to redirect users. One prominent link, 'https://ttraff.cc/pify?keyword=2017+hyundai+elantra+owners+manual', is identified as a malicious redirector. The document's structure and the presence of a malicious redirector strongly suggest an attempt to lead users to harmful 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/pify?keyword=2017+hyundai+elantra+owners+manual
    • http://files.mbpphotobooths.com/uploads/1/3/0/8/130815381/8309751.pdf
    • http://files.harvardpreg.org/uploads/1/3/1/4/131437410/lexorerad-wekasoxoda.pdf
    • http://files.abbotstones.co.uk/uploads/1/3/0/8/130874012/d2320.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9739/1261/files/gelomitosuvakebirekal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/julanefiwozuxam.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/lasebopa.pdf
    • https://cdn.shopify.com/s/files/1/0439/3664/5275/files/zemixad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wonazonuv.pdf
    • https://cdn.shopify.com/s/files/1/0441/3263/0680/files/pufisalidaxobogomemabeso.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/44934023313.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/60916129967.pdf
    • https://cdn.shopify.com/s/files/1/0433/3898/9718/files/zejid.pdf
    • https://cdn.shopify.com/s/files/1/0437/6805/3909/files/57078107905.pdf
    • https://cdn.shopify.com/s/files/1/0439/0794/0520/files/67372811846.pdf
    • https://cdn.shopify.com/s/files/1/0430/5122/1146/files/8181477392.pdf
    • https://cdn.shopify.com/s/files/1/0435/5994/4353/files/48140294457.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_off0000615a.bin
6872403ea1226816675d777a469e81438ffc395b12ff703de7d3dc306257308a
pdf-font-stream PDF embedded font (sfnt) at offset 0x615A 5572 bytes
font_01_sfnt_off00007442.bin
11ca6e51a093269f4a809d2ff26570392090a2a68eba42845361bab08f8b0f26
pdf-font-stream PDF embedded font (sfnt) at offset 0x7442 10288 bytes