Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc09a77d2a0b0e4…

MALICIOUS

PDF

35.5 KB Created: 2020-09-04 14:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15f3b00ffa3e25e49d6fac9e6e6552de SHA-1: f48ceadf1fab5dca38ff112b2397d9226b4ae438 SHA-256: bbc09a77d2a0b0e4bb34d9d163fed2b4bf0d48488a42ba8138a2e1b9b8af6e9f
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.me/wix?keyword=cancer+my+chemical+romance+piano+sheet+pdf', is flagged as a malicious redirector. The document also features a large number of external PDF links, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or redirection 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.me/wix?keyword=cancer+my+chemical+romance+piano+sheet+pdf
    • https://static.usrfiles.com/ugd/98857b_67c6704928c6407aa97eeaf3a221354d.pdf
    • https://static.usrfiles.com/ugd/913720_f364bd6edd19446d9d45de15fba6b667.pdf
    • https://static.usrfiles.com/ugd/d55797_a5de4a3053204335ae16ea50f6aca6e1.pdf
    • https://static.usrfiles.com/ugd/83e24f_e5ff62acdbf646729d4d983e09798a62.pdf
    • https://static.usrfiles.com/ugd/957c7b_d758b82f4c814e2d94c6f6e734f014f9.pdf
    • https://static.usrfiles.com/ugd/6fd45c_6e3d9b4501fc47569bc6bdf6d36ccd39.pdf
    • https://static.usrfiles.com/ugd/16879a_9de77d413b154d6bbe57dafea3a9f342.pdf
    • https://static.usrfiles.com/ugd/0c268c_141c17ca9f7a4ad199c313cd941f29e3.pdf
    • https://static.usrfiles.com/ugd/02beb7_73e4394ac9444f41aa3d3df4c0c37aa4.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_aea305c3e3f545ceb94f2da7f8934626.pdf
    • https://cdn.shopify.com/s/files/1/0450/0835/5486/files/18140348365.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/motivation_letter_templates.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4967/files/lupeselakapodikum.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/zokasimawuzesu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/22322121402.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_7cce67b5133a41f681cd6e8f07d7b133.pdf
    • https://static.usrfiles.com/ugd/b8c837_1229d99cadd74615a225a1d4375d81ec.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_off00004bf6.bin
42732d46b4ae0e50ee836746916d49c90164df3acf1733aa0bd26beef9368240
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF6 5404 bytes
font_01_sfnt_off00005e31.bin
09a40dcf63a5decfc2eb5b062400d89aedfc5b10c589ea28f96d85f5e02cf939
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E31 10472 bytes