Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead224bcc4bea1f2…

MALICIOUS

PDF

44.5 KB Created: 2020-09-01 18:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df38bed826f5bc02be0036887eb9d959 SHA-1: b46743bb7d75753948c2f3dc2a2b5d9d96513f82 SHA-256: ead224bcc4bea1f22308682553337e76a3919d52fdeda16eb29410f5280eb47b
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, which is disguised as a product listing. This indicates a phishing or scam attempt. The PDF also contains a large number of links to other PDFs hosted on static.usrfiles.com, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. No scripts were extracted, but the presence of the malicious redirector and the overall structure strongly suggest a phishing attack.

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.com/wix?keyword=lightning+digital+av+adapter+for+android
    • https://static.usrfiles.com/ugd/08fe48_ca10f466245840c18fa58fa5b21757f9.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_ae0868c05018445497b4fd2f6b17c38e.pdf
    • https://static.usrfiles.com/ugd/ae059d_bd64273f8ece466a8122263f92cfbcf4.pdf
    • https://static.usrfiles.com/ugd/0047a4_cde76b31adf54cd193e674fa119b1b53.pdf
    • https://static.usrfiles.com/ugd/b8c837_de221f358af14cefb7bdd19a92485e94.pdf
    • https://static.usrfiles.com/ugd/4b68be_b02f0db3106e4fa99143471a0e81409b.pdf
    • https://static.usrfiles.com/ugd/345929_b53d7aa3dbcc450d861b691c00a8992e.pdf
    • https://static.usrfiles.com/ugd/de3d83_2dd2b065e39a4164a984b4b0ea064ed9.pdf
    • https://static.usrfiles.com/ugd/b91566_09ac67756d2a4f90a9f647807228fb40.pdf
    • https://static.usrfiles.com/ugd/3bca44_1bba959913d64a69ae98d8ba51263d3b.pdf
    • https://static.usrfiles.com/ugd/6cf392_4290f42b3763439c8832b0cbe698bb29.pdf
    • https://static.usrfiles.com/ugd/b8c837_73b8128cf8eb4dcb8ecc122c4325285c.pdf
    • https://static.usrfiles.com/ugd/c068f8_ba63f27b33f441d9b07d7f0ab49e2243.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b86ac5d3a4c43088823d502d87f9643.pdf
    • https://static.usrfiles.com/ugd/7e6083_9773d392a8e842ebad129cfbe5ce1b0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf8204b084274036b0933a571710e5af.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b1a633001ce4af7bdc2582769e90779.pdf
    • https://static.usrfiles.com/ugd/33a2e4_fdb7e536e28c499d83c48e73e553668d.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_off00006e16.bin
0cea4866f756cca0e107135d7e84c099602d41452e2c80650dcd0e953f79886e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E16 5124 bytes
font_01_sfnt_off00007f92.bin
316e77dbe8c28d0021b2a9fe840d9ef7ee242e1966650e8a207caff21057d817		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F92 11368 bytes

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