Malicious PDF — malware analysis report

Static analysis result for SHA-256 348ac063ddefbcaf…

MALICIOUS

PDF

35.9 KB Created: 2020-08-04 20:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90b0d1515ef858a030542bacd4e14e90 SHA-1: 69f6973eca401a5c1abb041d719303c6445605dc SHA-256: 348ac063ddefbcafb61c8a196355c66440ece6f8217324065bc16bb814d6cf4d
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 of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.ru). This suggests a link farm or SEO poisoning technique designed to lure users into downloading malicious content. The document body, though heavily obfuscated, contains text related to 'academic writing from sources pdf free download' and the malicious redirector URL, reinforcing the lure.

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=sourcework+academic+writing+from+sources+pdf+free+download
    • http://nukogal.anthonymichaelscatering.com/uploads/1/3/0/8/130814788/671bfec22b8b7.pdf
    • http://files.blazindancefitness.com/uploads/1/3/0/7/130740097/zodanexuvitolu-nekikolizejutot.pdf
    • http://files.hiddenoakacresnigerians.com/uploads/1/3/2/6/132681307/5a099b8756.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/frost_dk_icy_veins.pdf
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/rerotawol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70745323757.pdf
    • https://cdn.shopify.com/s/files/1/0432/3485/3021/files/28821992689.pdf
    • https://cdn.shopify.com/s/files/1/0428/2764/5084/files/39122345282.pdf
    • https://cdn.shopify.com/s/files/1/0436/1591/2098/files/sunuribe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/git_reset_local_branch_to_remote.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwofomakilaxenifotet.pdf
    • https://cdn.shopify.com/s/files/1/0433/8378/3575/files/kumevulolezadorosizatoj.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/35906180696.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/runuwadobona.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/xomabowezizerigodi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0762/2817/files/2150122162.pdf
    • https://cdn.shopify.com/s/files/1/0437/6736/5794/files/bujufibaje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tazoxusejeko.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_off00004d70.bin
271ab016450ce186f090697c2de1b1daeef324e247eeeb73c9caf0cd3e3fcbd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D70 5736 bytes
font_01_sfnt_off00006101.bin
aedc6c94cca1c6815d8be4281faf3e3e85fbcfa95196ebd55a784ab65223c876
pdf-font-stream PDF embedded font (sfnt) at offset 0x6101 9772 bytes