Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9c2c7b8380f15c…

MALICIOUS

PDF

32.9 KB Created: 2020-08-30 21:36:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6600fdf60ad8c226ff93ef52b4ca1512 SHA-1: 3f7227a02147fa773013cb5b509467cc348569ab SHA-256: 5c9c2c7b8380f15c1b54552cf6b7b3c6c3fc9541c5ca67a4a11d82f85659a4d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to SEO-optimized PDF files hosted on Shopify. One of these links, https://ttraff.ru/wix?keyword=original+xbox+power+cord+specs, is flagged as a known malicious redirector. This suggests a campaign to drive traffic to malicious infrastructure, likely for phishing or malware distribution.

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=original+xbox+power+cord+specs
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/dijukapoxopilerijemikofo.pdf
    • https://cdn.shopify.com/s/files/1/0447/6734/6839/files/breathing_for_singing.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2392/files/29927897333.pdf
    • https://static.usrfiles.com/ugd/b8c837_658eb02af51e4b33abb5bdd290bff5be.pdf
    • https://static.usrfiles.com/ugd/b65acf_ccd282a14d474d57bd466c96124f462e.pdf
    • https://static.usrfiles.com/ugd/97368a_71f68379a97d4fd6aaa4153cc8436532.pdf
    • https://static.usrfiles.com/ugd/8b49c6_1f211cf609ad475fa208027429f7c944.pdf
    • https://static.usrfiles.com/ugd/89363e_34b21960e25a43f787edfc8af24842da.pdf
    • https://cdn.shopify.com/s/files/1/0437/0831/7850/files/flow_cytometry_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9387/files/pafepejuxigekar.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_off00004159.bin
39ca533d7aaa7275665fb83d84f9636cc10f2bd447371263b401c1af7a966c30
pdf-font-stream PDF embedded font (sfnt) at offset 0x4159 5568 bytes
font_01_sfnt_off00005459.bin
f481b22f0a18cdeb8dea6d2d8e3bb96688b65a26cd88e13e8b87fdbc35f3263c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5459 10304 bytes