Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4baa982eb98b80…

MALICIOUS

PDF

47.8 KB Created: 2020-08-02 06:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa4a4d9fcd7ad57dedd0de7123f3294a SHA-1: cdb87000fd347244732bf80a855f889e9dcd71a9 SHA-256: cc4baa982eb98b806825b83ad0138be612dc8ec8c75fd38e159de752f7b07383
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, but one critical link directs to a known malicious redirector at 'ttraff.com'. The document body text, though garbled, includes the phrase 'Git untracked files', suggesting a lure to attract users to click on the malicious links. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=git+untracked+files
    • http://files.semanathompson.com/uploads/1/3/1/4/131452836/1076399.pdf
    • http://files.itrpath.com/uploads/1/3/1/4/131406295/baxixirinewasutolize.pdf
    • http://files.red-bean-coffee.com/uploads/1/3/2/6/132683017/bexesixikugoxix.pdf
    • http://files.suzannewittfoley.com/uploads/1/3/0/9/130969059/vonukovirotamer.pdf
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/29285932576.pdf
    • https://cdn.shopify.com/s/files/1/0429/5150/8131/files/95577081789.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/4870643011.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/70945719452.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/36898954388.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/zinirejiwiloborifokidol.pdf
    • https://cdn.shopify.com/s/files/1/0429/1205/5463/files/jetesufesidojezab.pdf
    • https://cdn.shopify.com/s/files/1/0437/8945/1416/files/dark_eldar_codex_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/kumimerujewu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zamujogeve.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/8238154297.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8242/files/83045178167.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_off00006bf6.bin
49e0eabb58749456fd8f3ad94b61e9bc4d51e844310df1d567791e62b070a51b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF6 5112 bytes
font_01_sfnt_off00007d67.bin
2a141552b5035fef702d71a7ed441dd067c760d6f0a1fe2ffdf96aea3a666fd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D67 4084 bytes
font_02_sfnt_off00008cc6.bin
02086678b3f9680e6cc224889c949ac20cd1db2f289154b647cb8881aaf05e4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC6 10804 bytes

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