Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5e9195abd73ed1d…

MALICIOUS

PDF

39.0 KB Created: 2020-08-20 08:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee3f22f19869a22051d6f8989f44cde8 SHA-1: 62d051e194963930f244b8c8f21013e9a287d45d SHA-256: c5e9195abd73ed1d0a52881afcb5f5779731f4693ba274747d6ae3dbaa943c8a
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=code+vein+blood+codes+guide'. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector indicates a likely phishing or malware delivery attempt.

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=code+vein+blood+codes+guide
    • http://files.newlifetucson.com/uploads/1/3/1/4/131483097/tewololux.pdf
    • http://warozesep.afsardmdlab.com/uploads/1/3/2/8/132816165/7404495.pdf
    • http://files.garealpropertylaw.com/uploads/1/3/0/7/130739986/3324373.pdf
    • https://cdn.shopify.com/s/files/1/0434/2166/3397/files/lanitaxanuvetikajosulofe.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6818/files/javascript_static_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/82528935664.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/75915002380.pdf
    • https://cdn.shopify.com/s/files/1/0435/7780/2911/files/connected_speech_rules.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9785/files/jitodubufoneminaze.pdf
    • https://cdn.shopify.com/s/files/1/0437/3577/7445/files/wejinejitetitiwurikedinap.pdf
    • https://cdn.shopify.com/s/files/1/0440/5713/3221/files/schengen_visa_form_italy.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/kejebetof.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8262/files/andela_home_study_curriculum.pdf
    • https://cdn.shopify.com/s/files/1/0436/1682/9603/files/35916731022.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_off00005c4e.bin
6cd7105ff5035d29c100655bd84f6e55289f9b4236c5764f08713615d00a6c7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4E 4908 bytes
font_01_sfnt_off00006d19.bin
d05c2c70c37bfeab0ff860b903e6febc75193567776f60600f2334560c3c67b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D19 10084 bytes