Malicious PDF — malware analysis report

Static analysis result for SHA-256 175d1b0a70c3bfea…

MALICIOUS

PDF

35.8 KB Created: 2020-08-20 14:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87a3ad0c70fdbd1f27edd6ceaf22b56f SHA-1: b73b2008c89f73935ed8f0fd7169a5bc7800b111 SHA-256: 175d1b0a70c3bfea0f35dfab1fe5bfaae47140dd4288d98ee180550dff994531
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is likely used to distribute malware or phish for credentials. The document body, though heavily obfuscated, contains this URL and other links to Shopify-hosted PDFs, suggesting a link farm or download lure. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=ms+office+2016+full+version
    • http://sajema.manilges.com/uploads/1/3/1/3/131379877/3589728.pdf
    • http://files.latelierpatisserie.com/uploads/1/3/2/6/132695829/13543.pdf
    • http://lipenep.puregassa.com/uploads/1/3/1/4/131437508/9461601.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0831/0943/files/89404444463.pdf
    • https://cdn.shopify.com/s/files/1/0437/3538/4215/files/30490278976.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/99208216857.pdf
    • https://cdn.shopify.com/s/files/1/0440/5883/7142/files/27187599919.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/worunetaferewepuguga.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/sbi_bank_personal_loan_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/sujid.pdf
    • https://cdn.shopify.com/s/files/1/0434/1615/8359/files/84036309526.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/magisterium_5_la_torre_dorada_descargar_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/18451099861.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zukukujumifuxutage.pdf
    • https://cdn.shopify.com/s/files/1/0428/4183/3635/files/36844147048.pdf
    • https://cdn.shopify.com/s/files/1/0434/6229/5716/files/compounds_vs_molecules_worksheet.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_off00004e53.bin
0a0e29fb48769316b43e394bc4a46bb512a71619488f67c4e320f4b13ac3386b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E53 5212 bytes
font_01_sfnt_off00006033.bin
2720f9baf9ec0def54993ad2a3e10266808526c07a206df0ae906b1e6b7974c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6033 10076 bytes