Malicious PDF — malware analysis report

Static analysis result for SHA-256 af74695e408839b7…

MALICIOUS

PDF

41.3 KB Created: 2020-09-01 12:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32207a27da26d69a7eddcf896b532727 SHA-1: a15714f7646f1705e0d38ee5c3b5801748f0623f SHA-256: af74695e408839b7aef58f343f9cb850af0c2ab067602fb60cd9a99588a05259
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it is a redirector link. The document body, though partially corrupted, contains text related to a gas grill and a URL that is part of a link farm. The primary malicious URL is https://ttraff.ru/pify?keyword=char-+broil+gas+grill+performance+340b+test, which is likely used to redirect users to further malicious content.

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=char-+broil+gas+grill+performance+340b+test
    • https://static.usrfiles.com/ugd/5b9a87_9e8588e6797f45a2ac87f3cda76904f5.pdf
    • https://static.usrfiles.com/ugd/52b593_738ded4d14ae4b3a873f62d96e4abfd6.pdf
    • https://static.usrfiles.com/ugd/2ac701_28ab89d5e63c45dbb54d472762d0581f.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/83958544303.pdf
    • https://cdn.shopify.com/s/files/1/0437/7241/2055/files/fivugefamimafuku.pdf
    • https://static.usrfiles.com/ugd/21e6f2_8b9ef70c2b984a08a427b32a38d3433b.pdf
    • https://static.usrfiles.com/ugd/270e53_a4b7834d3cd24bb7b56ba4959b92e9b5.pdf
    • https://static.usrfiles.com/ugd/5ecadc_c4075509afae4478adee6dea94076da3.pdf
    • https://static.usrfiles.com/ugd/b8c837_879b8725eb8b4873a9972f7b9620de61.pdf
    • https://static.usrfiles.com/ugd/b8c837_9badf7fb0ffd40e79498412c81767ac0.pdf
    • https://static.usrfiles.com/ugd/b8c837_f44beb747a9245f6bf874a2b572fcb98.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_6e0328175a634d16abd576ab61a97927.pdf
    • https://static.usrfiles.com/ugd/c5d40f_5831993a9f22429a82810a5672b2e84a.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ad74317eeaf4f898687327d61875ccd.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_off0000626b.bin
3b1771856e3847f9034155bd663ef4107b7120209984bfaf963d9fe3f8b1aa28
pdf-font-stream PDF embedded font (sfnt) at offset 0x626B 5900 bytes
font_01_sfnt_off00007661.bin
3fea72da8b6305db43914b2463e8c748850f84625a59d2a143b2b01cfb4ac820
pdf-font-stream PDF embedded font (sfnt) at offset 0x7661 9836 bytes