Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c7aa6548dc4936…

MALICIOUS

PDF

35.2 KB Created: 2020-08-19 02:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca43259eed648d576d3ec893a9d3d348 SHA-1: 5688ea36d2e5699307a1482ef7897f10d061cecc SHA-256: 93c7aa6548dc493625c2eaa98a0160528ba5caee43e918449301fb210b4672bd
152 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector, https://ttraff.cc/pify?keyword=harmonize+follow+me+audio, which is a strong indicator of malicious intent, likely for phishing or malware delivery. The document also hosts a large number of external PDF links, many pointing to Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=harmonize+follow+me+audio
    • http://vodeva.viennaartstudio.com/uploads/1/3/2/6/132696194/bd49ccd.pdf
    • https://cdn.shopify.com/s/files/1/0439/0027/2792/files/14210634806.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/49511565375.pdf
    • https://cdn.shopify.com/s/files/1/0445/6821/5716/files/categorical_data_analysis_agresti.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/daxinotosorivowobamapimon.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/53036446526.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2190/files/bibliotherapy_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/farm_irrigation_system_design.pdf
    • https://cdn.shopify.com/s/files/1/0434/2857/7447/files/ischemic_heart_disease_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0430/2766/0951/files/79176230053.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5142/files/84881379660.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000409e.bin
3bcd6b89dcd60ed1b1167fde5649698742dc5a68acc337d7ed0962d261f44804
pdf-font-stream PDF embedded font (sfnt) at offset 0x409E 4780 bytes
font_01_sfnt_off000050c6.bin
96cc4c0c7c63f9e86de8138a767e3597e8471180ac3f1327c1d8fbd3bdbe28d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x50C6 9796 bytes
font_02_sfnt_off0000723c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x723C 4324 bytes