Malicious PDF — malware analysis report

Static analysis result for SHA-256 527fbe031ff6b8ec…

MALICIOUS

PDF

40.2 KB Created: 2020-09-01 03:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12011ade27c4dfe5e8dfa2d035147d12 SHA-1: 900ad092900e5f60f4e3ef193227558615ef66c9 SHA-256: 527fbe031ff6b8ec40fd26150dc7ce91538f1b537579254a696cd7015c9876db
152 Risk Score

Malware Insights

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

The PDF contains numerous links, with one pointing to a known malicious redirector at 'https://ttraff.ru/wix?keyword=trust+and+obey+hymn+lyrics+pdf'. This redirector likely serves to obscure the final malicious destination. The PDF structure and the presence of many external links suggest a link farm or SEO poisoning tactic to attract victims. No scripts were extracted, but the primary malicious activity appears to be redirecting users to harmful 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/wix?keyword=trust+and+obey+hymn+lyrics+pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2445/files/descendants_3_soundtrack_mega.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/44620874172.pdf
    • https://cdn.shopify.com/s/files/1/0440/6660/3158/files/64252729000.pdf
    • https://cdn.shopify.com/s/files/1/0431/4179/1895/files/25895463455.pdf
    • https://cdn.shopify.com/s/files/1/0436/0133/0339/files/kogokevefudimobujej.pdf
    • https://static.usrfiles.com/ugd/b8c837_84e7eea281714fa3a1c0a06a05a3401c.pdf
    • https://static.usrfiles.com/ugd/8acad3_422b115b23e94dcf9823c3ba4b04d7a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_13069e5ea59e426e91a94cabcaab5760.pdf
    • https://static.usrfiles.com/ugd/f3cb45_27987e6369794fd1826e9812093485b3.pdf
    • https://static.usrfiles.com/ugd/cafc24_4c417923ddd64be8bb2cd21265f7a93e.pdf
    • https://static.usrfiles.com/ugd/6da380_9f307728ba0f47dca6e17c6ee988e121.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5eb673b6412452e94fc6eca72eff72b.pdf
    • https://static.usrfiles.com/ugd/10e3af_0cd835201aec453089fdc80252716721.pdf
    • https://static.usrfiles.com/ugd/02beb7_406b87e23b4f4c4f8d87f277b376a6df.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_off00005fcf.bin
6466985b147cd562c642d4354dc5bfe91579512c2f0c35e450cf680ef313103c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCF 5588 bytes
font_01_sfnt_off000072a7.bin
9492bfee1270a9ba8edf757c66a34bb52cc250ce3a9faab891ad5aecee9894cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x72A7 9808 bytes