Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ef49c0f9dec4aa…

MALICIOUS

PDF

44.7 KB Created: 2020-08-14 04:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37147a04ee74d8c4e9541d399ac26ff0 SHA-1: 2ba8836080961ac7c63e217ca9e9664f2d45949b SHA-256: d7ef49c0f9dec4aad21b5c56a603eea46a686c9eb94a4c4e7073f138db8a14e2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a high number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL to the malicious redirector, suggesting the document's primary purpose is to lure the user into clicking this link, likely leading to further malicious content or downloads.

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/pify?keyword=digital+forensics+investigation+report+template
    • http://voxim.melaninandmotherhoodnj.org/uploads/1/3/0/8/130874284/xusineb.pdf
    • http://sizamadiw.anamatani.com/uploads/1/3/1/4/131453494/c3d96b32af130.pdf
    • http://files.taaonline.org/uploads/1/3/1/8/131856285/c5bed6fa80c566.pdf
    • http://lanefa.guavachocolates.com/uploads/1/3/0/8/130874457/c071728.pdf
    • http://files.joedonovanboxing.org/uploads/1/3/1/6/131637606/5982022.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/88533577850.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81256704061.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/27259735037.pdf
    • https://cdn.shopify.com/s/files/1/0440/0916/0862/files/bisipewulijenodaju.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/14581730194.pdf
    • https://cdn.shopify.com/s/files/1/0431/4621/5584/files/lavodetarikeraxigofuw.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4162/files/49591606434.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/farexoruxonuvuneratudove.pdf
    • https://cdn.shopify.com/s/files/1/0440/8508/4310/files/28917651513.pdf
    • https://cdn.shopify.com/s/files/1/0434/2546/4476/files/bias_in_qualitative_research.pdf
    • https://cdn.shopify.com/s/files/1/0454/4820/0342/files/mathematics_in_the_modern_world.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ea3.bin
26e4c39e63c2c686f0e2f443f68b52af0b4bfad760a55819a9a4dfd9392becce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA3 5396 bytes
font_01_sfnt_off000080f8.bin
240c75d93fa15a88ea372da8a8717789f68626c1807de657a2db7ad58a05fd20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F8 10696 bytes

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