Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a31c91c53a9b7b…

MALICIOUS

PDF

35.2 KB Created: 2020-08-15 01:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74963732410a65b345c6c014a9218f92 SHA-1: a06846a4f650060015c07697ba68b56224fb877c SHA-256: 38a31c91c53a9b7b9577feaca2f3f3a90eecd56be312987c22bb1d41b04e2bc7
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. The document body, though heavily obfuscated, contains text suggesting it is an answer key for 'Magruder's American Government', a common lure for educational content. The primary malicious URL is ttraff.ru, which is flagged as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites.

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.ru/pify?keyword=magruder%2527+s+american+government+answers+key
    • http://nodadaliz.grey-music.com/uploads/1/3/1/8/131856033/2672356.pdf
    • http://files.auroramusicacademy.ca/uploads/1/3/1/4/131483275/82a3359244a8.pdf
    • http://files.dvowfoxvalley.org/uploads/1/3/1/3/131382955/4971752.pdf
    • http://nobubo.rjacksonscience.com/uploads/1/3/0/8/130874493/77c5509.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/paxotaxazojulilinitulo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4062/0200/files/kotar.pdf
    • https://cdn.shopify.com/s/files/1/0432/7938/4736/files/vetazifunatige.pdf
    • https://cdn.shopify.com/s/files/1/0443/1472/2460/files/65th_national_film_awards_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3331/2925/files/carol_of_the_bells_piano.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/xazupatejawuvo.pdf
    • https://cdn.shopify.com/s/files/1/0448/0250/6909/files/cobra_200_gtl_dx.pdf
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/bioassays_advanced_methods_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/sekajabapuli.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_off00004c82.bin
ae630c2c3a93bc7b1e6c0ba77d38c3f0ccc7f5e123f4ef07af079e295ce1eafd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C82 5584 bytes
font_01_sfnt_off00005f99.bin
634c61a550a140c7d429a6688f96ec6f03d2b734866670f5b2ae623520ade2a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F99 9564 bytes

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