Malicious PDF — malware analysis report

Static analysis result for SHA-256 64091cffbe30b950…

MALICIOUS

PDF

36.2 KB Created: 2020-08-31 08:10:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 779e601f87e1adeb3a52f5c441b5126c SHA-1: 086c7c948eff99c174273f75064aeb870d4a7031 SHA-256: 64091cffbe30b9507e89d8546194440951befb26cf5475567047e940b115bef9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that redirect to a malicious URL, specifically `https://ttraff.com/wix?keyword=free+download+bahubali+2+full+movie`, masquerading as a free movie download. The document also hosts a large number of other PDF links, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness, supporting the observed redirection and link farming behavior.

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=free+download+bahubali+2+full+movie
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89965927340.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/gulag_archipelago.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/32889962286.pdf
    • https://cdn.shopify.com/s/files/1/0449/6500/3423/files/australian_open_2020_winner.pdf
    • https://cdn.shopify.com/s/files/1/0433/0042/1790/files/motagibugaxu.pdf
    • https://static.usrfiles.com/ugd/b8c837_c170de073e5e41bab354f0f2c870e464.pdf
    • https://static.usrfiles.com/ugd/99afdc_72a96a91f243492caac173be3992f126.pdf
    • https://static.usrfiles.com/ugd/b8c837_51e18f378204404bb747b8fc34048345.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_4649db3f11404dedb2c03ea0f9bd2b4d.pdf
    • https://static.usrfiles.com/ugd/b8c837_55bf3f6d318a4a059be0e1e5e90bd68c.pdf
    • https://static.usrfiles.com/ugd/3cb679_58f28091183644588bf519e3aa393b06.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7cf74e645f049718fac20c85c230622.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf3e10c080e9492e8cd5ef00654012a3.pdf
    • https://static.usrfiles.com/ugd/3aca14_6030b9eef95f459da34920129b761b63.pdf
    • https://static.usrfiles.com/ugd/0789d5_2254fe9ae3c24b88a1847a8f560a06d2.pdf
    • https://static.usrfiles.com/ugd/724fb5_76cde7e5f30f444c944968a98219b7f5.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050aa.bin
bf408aef8bc1cc231e99152ff3e71de5c71a2ebd4cb4ebca5d7e614cc3f4b7d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50AA 5348 bytes
font_01_sfnt_off000062c5.bin
80d1856a58049fa814eb67730c6cb3167707954038f382be6c1380b7ea5deef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C5 9712 bytes

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