Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b64a6c24f066c4…

MALICIOUS

PDF

44.5 KB Created: 2020-07-07 11:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1eb3035d75e6f18adda45c7ee59fa868 SHA-1: 567ce977fcd829f912dbe0a5e585ce369e51c9c9 SHA-256: 64b64a6c24f066c475f2bc75c19a450c1918b75aa39e2b59b5c9f92be7be6a54
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious sites. The document also functions as a link farm, containing numerous links to other PDF files hosted on various domains, likely for SEO manipulation or to distribute further payloads. The ML classifier strongly indicated maliciousness, supporting the presence of these malicious links.

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/wb?keyword=connecticut%20dmv%20manual%20audio#connecticut+dmv+manual+audio
    • http://files.mnjeweler.com/uploads/1/3/1/4/131437740/fomurogoxufirofaliz.pdf
    • http://files.pennjournalconlaw.com/uploads/1/3/2/6/132682694/bawibixijuzawo.pdf
    • http://files.stmarymagdalenewpg.org/uploads/1/3/1/8/131856531/badifa.pdf
    • http://files.linhr.com/uploads/1/3/1/0/131070189/tabotusatoboza.pdf
    • http://files.mackeiganmarketing.com/uploads/1/3/1/4/131452732/sodopafesub.pdf
    • http://files.explorestanton.com/uploads/1/3/1/4/131453216/6741733.pdf
    • http://files.yunkawasiperu.org/uploads/1/3/1/3/131379612/vizarifogumawov.pdf
    • http://files.mylunarsign.com/uploads/1/3/1/8/131857482/6fcae3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://wurumopo.files.wordpress.com/2020/06/70339393127.pdf
    • https://bidazinefak.files.wordpress.com/2020/06/95762758540.pdf
    • https://tofosigon.files.wordpress.com/2020/06/99393774006.pdf
    • https://rawujax.files.wordpress.com/2020/06/suxafi.pdf
    • https://bavorekivaso.files.wordpress.com/2020/06/nimimoxafitubosamuzabova.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_off0000711f.bin
d89a466955bb8e9660c0bb83402eb9edb7d0a6cc868ed01b5008a27847db73a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x711F 4776 bytes
font_01_sfnt_off00008142.bin
a44bf4dae101112b76a22f96d4fac7a35b6ab987dc14f7f3914bf1e686ba10b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8142 10488 bytes