Malicious PDF — malware analysis report

Static analysis result for SHA-256 8180e744191f065a…

MALICIOUS

PDF

32.7 KB Created: 2020-08-20 01:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c174768d453b7872edb75d85745cfd01 SHA-1: 0a9980062a3e1d00596ab81b08b7a9721984b599 SHA-256: 8180e744191f065a265874ecd2ba420a16c41ed511923fd7549d8db0cbb943a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm strategy, aiming to attract users through seemingly relevant search terms. The presence of numerous embedded links, many pointing to Shopify-hosted PDFs, suggests an attempt to obscure the ultimate destination and potentially evade detection.

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=alanganallur+jallikattu+2017+video
    • http://woroxamir.rmackson.com/uploads/1/3/0/8/130874493/kunip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8294/8506/files/pozafevase.pdf
    • https://cdn.shopify.com/s/files/1/0447/8982/5687/files/bioplastic_from_banana_peels.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/sezonizumijirezexelote.pdf
    • https://cdn.shopify.com/s/files/1/0433/0579/5752/files/aghori_baba_photo.pdf
    • https://cdn.shopify.com/s/files/1/0439/9919/9390/files/digital_logic_gate_questions.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/boiler_design_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/4687/8882/files/bodifolapuwurezoxam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/xititagenexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/zudonexovalusojexiganop.pdf
    • https://cdn.shopify.com/s/files/1/0439/4749/1486/files/90010162333.pdf
    • https://cdn.shopify.com/s/files/1/0430/6318/1463/files/18296079216.pdf
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/email_format_html_vs_plain_text.pdf
    • https://cdn.shopify.com/s/files/1/0437/8384/8097/files/jonufomofabedo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4769/7049/files/9506146316.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_off00004432.bin
0d5304bfab8a7840cc21a0ad8f471a9a7160939bb75c7f08761104509923bb47
pdf-font-stream PDF embedded font (sfnt) at offset 0x4432 5412 bytes
font_01_sfnt_off000056b9.bin
a6a8668dce61a9d71436d09af2b8ed63f102522f2c9bb68f017f129fea75e613
pdf-font-stream PDF embedded font (sfnt) at offset 0x56B9 9164 bytes