Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4911bc6f776ad1…

MALICIOUS

PDF

39.5 KB Created: 2020-09-03 18:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d025aa07a637392c43e3632cbd5e3364 SHA-1: 42dc6b6da85b919c25e50272de213faa1b9f0fb0 SHA-256: 8e4911bc6f776ad1d8954ebcb5c64821b2dcf89982d88326639debbe206047bd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links, one of which, 'https://ttraff.me/wix?keyword=canon+ipf770+manual', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise the malicious link as a Canon printer manual. The PDF also hosts a large number of other links, indicating a link farm strategy.

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=canon+ipf770+manual
    • https://static.usrfiles.com/ugd/77941b_2331c13b351d4081882e08a876e813b4.pdf
    • https://static.usrfiles.com/ugd/c3548c_9cf0f3277a0e4204adcacde7ae82ee09.pdf
    • https://static.usrfiles.com/ugd/11f207_2a9a7c380317412c8695c100d541a2ae.pdf
    • https://static.usrfiles.com/ugd/f0e51d_b1c83059b9df4b71af62c8763a22d35e.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_eeef22d479e04f2d8cd62bd1a8d1ebef.pdf
    • https://cdn.shopify.com/s/files/1/0434/4440/4374/files/pamaxo.pdf
    • https://cdn.shopify.com/s/files/1/0465/1450/3830/files/vokibusovitamuri.pdf
    • https://cdn.shopify.com/s/files/1/0440/5752/6437/files/vaxudup.pdf
    • https://cdn.shopify.com/s/files/1/0432/4176/7072/files/new_business_flyer_templates_free.pdf
    • https://static.usrfiles.com/ugd/38955b_a2fd91a749b946558a1e20abdaaa0155.pdf
    • https://static.usrfiles.com/ugd/ab059d_f18adcd116b24365a8a5832e78ae4899.pdf
    • https://static.usrfiles.com/ugd/49f5ef_d599eea3c6ad4c228e3ec7df7364a592.pdf
    • https://static.usrfiles.com/ugd/5ed537_0b3b1f2f79204d9d90e8f9d36bda6eb0.pdf
    • https://static.usrfiles.com/ugd/b8c837_a80c0ebfd5764bcf99e48ae847716463.pdf
    • https://static.usrfiles.com/ugd/735424_25cc1d94bdf64eedaf8febfffd7877a1.pdf
    • https://static.usrfiles.com/ugd/3fc21f_3eed8d4e12a9454fab556c426ea75652.pdf
    • https://static.usrfiles.com/ugd/b8c837_dce3492ddc904da6843f81230637b7e9.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_off00005df3.bin
6ac28c19026dc66a6d9045bbbe9a34da7ded958f438018e693bf4ee2dbbaad63
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF3 4900 bytes
font_01_sfnt_off00006e9b.bin
d97155783ffc94ab6a732f64a3112d5e1d7461bfefc2874ceedec817bec09d88
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9B 10192 bytes