Malicious PDF — malware analysis report

Static analysis result for SHA-256 708ded8e5b76c946…

MALICIOUS

PDF

32.5 KB Created: 2020-08-31 03:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47df1156b877fc81f985cadbfbfca853 SHA-1: 1a948e5d162ea8f254c5d602afe21eed18507116 SHA-256: 708ded8e5b76c9464b2d58ce8ecb6733ea4038f9c5d57be54ad5312cccebed05
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the presence of the URL https://ttraff.cc/wix?keyword=pdf+a+streetcar+named+desire strongly suggest a phishing or malware delivery attempt. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains garbled text but also includes the malicious URL, reinforcing the attack pattern.

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.cc/wix?keyword=pdf+a+streetcar+named+desire
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/52001415415.pdf
    • https://cdn.shopify.com/s/files/1/0429/0173/3542/files/nfl_playbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/mabitapodejuregiparo.pdf
    • https://static.usrfiles.com/ugd/f09a9d_8ae14fa1d20b49ceb3666740301a3c4d.pdf
    • https://static.usrfiles.com/ugd/6f58fb_6b25a6836519407b8811183c02ada148.pdf
    • https://static.usrfiles.com/ugd/78c764_bab511f2eebe42e8a10b29f5eb3ab58e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cc9a21817e24df2867177d881349732.pdf
    • https://static.usrfiles.com/ugd/c1615c_b59b6d2267db436f917b0f9487f11e9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f51bc2012eb84854a7d5e1f9fb98dab3.pdf
    • https://static.usrfiles.com/ugd/6290de_8e4c976146bc434887917f07a833490a.pdf
    • https://static.usrfiles.com/ugd/3dd68e_996504b9ef62427ab41c43489afce55f.pdf
    • https://static.usrfiles.com/ugd/c345b0_7e5f42f3d74a4cf3872262b9c7ef8353.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_off000042e4.bin
89f95e8baaafabdbcfbb239237a79446d567763366ca6051c5f26f0de81fcda2
pdf-font-stream PDF embedded font (sfnt) at offset 0x42E4 5136 bytes
font_01_sfnt_off0000543a.bin
47c9fdec277969ee2c84e09a97afcfdd4ceed0aa86f27d1980b753d1f4f3ea6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x543A 9740 bytes