Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf745b93d494e4d…

MALICIOUS

PDF

55.6 KB Created: 2020-08-24 11:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a002c5f8018f292859cc71b0b8d7004d SHA-1: 1bc50170d0c8cb249861aaea9ae11a909e16fae0 SHA-256: 6cf745b93d494e4d52fb504503d48023d47462232a3baaf9f677bbfb4c42be34
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure referencing a 'signed application form' and embeds numerous links, one of which, 'https://ttraff.com/pify?keyword=please+find+attached+the+signed+application+form', points to known malicious redirector infrastructure. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or SEO manipulation for phishing. No scripts were extracted, but the embedded links are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=please+find+attached+the+signed+application+form
    • http://files.northforsythdeca.com/uploads/1/3/0/8/130813448/bolelipizozipemoduve.pdf
    • http://files.susankralovansky.com/uploads/1/3/0/8/130813528/1926630.pdf
    • http://files.sicanguscribe.com/uploads/1/3/1/8/131871835/8636861.pdf
    • http://warinir.catchpennyshop.com/uploads/1/3/1/6/131606027/ef34544c7e8ea.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6542/6598/files/65938877647.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/fadonezafulujogowibejuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/5336/7975/files/91907415256.pdf
    • https://cdn.shopify.com/s/files/1/0459/2589/2263/files/protractor_jasmine_console_reporter.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7975/files/rutasuzufabawo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3747/files/poxagajezevuvujosadixaja.pdf
    • https://cdn.shopify.com/s/files/1/0433/6559/7342/files/ansi_code_list_electrical.pdf
    • https://cdn.shopify.com/s/files/1/0430/3188/8021/files/windows_10_update_exe.pdf
    • https://cdn.shopify.com/s/files/1/0451/1593/2825/files/padili.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/59120933192.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/aristoteles_retorica_gredos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000902a.bin
8b9a12d3df7ddd952eba210f73b33d3ad438593be70ce2bd9295b5b7268ff76c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x902A 3000 bytes
font_01_sfnt_off00009aec.bin
9e582c0888b6626b757d32e6343157a66445ba9ab93b8a9911b96e8c0cbcce59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AEC 5568 bytes
font_02_sfnt_off0000ada4.bin
957f3f78f094655c3c8b8f522d88fb84d476937368d0f8bbab5ee6b552081124		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADA4 10216 bytes

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