Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f8fe279082cd0f…

MALICIOUS

PDF

49.3 KB Created: 2020-08-03 22:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82bf7bebe6f08860f3ee2c6fcc56571c SHA-1: 5a6ad0e45dcbe527d62bc7dbe365936ee085987c SHA-256: 44f8fe279082cd0fabf5c84841e1d95b2be67a859a6121c32a0219021df0b203
120 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 pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning attack designed to funnel users to malicious content. The document body, though heavily corrupted, contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create documents for SEO purposes. The primary malicious URL is https://ttraff.com/pify?keyword=journal+of+acidimetry+and+alkalimetry+pdf, which is likely part of a phishing or malware distribution chain.

Heuristics 3

  • 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.
  • 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=journal+of+acidimetry+and+alkalimetry+pdf
    • http://files.youngpeopleandchildrenfirst.org.uk/uploads/1/3/1/4/131437074/85c581.pdf
    • http://files.nattycordonkayaking.com/uploads/1/3/0/9/130969801/3816610.pdf
    • http://files.ezservicelist.com/uploads/1/3/1/0/131070192/xikagapej_roreweje_tekivav.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/65654685295.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/99718776626.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5923/files/xigotorafuwikofisazujamal.pdf
    • https://cdn.shopify.com/s/files/1/0428/6038/0327/files/lawuzunemelalajoripasikot.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/50740755287.pdf
    • https://cdn.shopify.com/s/files/1/0433/0248/6180/files/jaxupavijuxisikulopexik.pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/158552975.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/warebalavabufuxikilux.pdf
    • https://cdn.shopify.com/s/files/1/0437/7860/5218/files/ipad_form_filler.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_off00005e74.bin
4cc2ffd77480b7686628404abad9a2d7d3abc65b0cbaf873d0a057ecca74e744		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E74 5280 bytes
font_01_sfnt_off00007063.bin
96a244259610ab9d750d56c553110a8fc470bc182bec834c19a9eecfb221ada8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7063 16496 bytes
font_02_sfnt_off0000a3b3.bin
9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B3 16036 bytes

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