Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ff98ea401c7380…

MALICIOUS

PDF

49.9 KB Created: 2020-08-30 15:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11bc471e79b727dbaebdbbae11278be5 SHA-1: ea91b04d491e161bfafac5e8dcbb813c79a7dd8e SHA-256: 24ff98ea401c7380c45c8fa7d03c3d1bed9afae3a394ecfadb703e3c37eb8c13
152 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically a URL associated with a redirector farm. The document body, though partially corrupted, contains text that appears to be a lure for a 'Mafia 3 trophy guide and roadmap', suggesting a social engineering tactic to entice users to click the malicious link. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=mafia+3+trophy+guide+and+roadmap
    • https://static.usrfiles.com/ugd/87a178_f0217998869a468588fb2227ddc26755.pdf
    • https://static.usrfiles.com/ugd/b8c837_0477fee2ee2e4f7086ad927eaeb3ddf1.pdf
    • https://static.usrfiles.com/ugd/3e9e83_f4949ff15ae847cbacbc964442c02b3e.pdf
    • https://cdn.shopify.com/s/files/1/0457/9016/7206/files/wivubuginilobizijojopimu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5350/5946/files/60366830320.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdf
    • https://static.usrfiles.com/ugd/b8c837_0265392217ca4d0c9113f8cf1b3a9dd3.pdf
    • https://static.usrfiles.com/ugd/b8c837_78dc4acaef3a41d4bac33137316ff669.pdf
    • https://static.usrfiles.com/ugd/3cb679_a217c4f7d6014da7bc341192de817f97.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6669a76336f4ab58e9517c4f2a0b01a.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_off00008458.bin
a8d61823ec71fd53a899203b78b14c87f86343c59f297f733015fe5acc3bd3d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8458 5516 bytes
font_01_sfnt_off000096fd.bin
e5eec2b0207e67c995d5b69e0c6c7e5852f70f6435e809d640a5c4becf91c8c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96FD 10536 bytes

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