Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8706aef0e4dcd67…

MALICIOUS

PDF

43.2 KB Created: 2020-08-21 18:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c7af3f57230df3879b41638f32fbe1d SHA-1: 8fbe5d2c77367f4b84cb0a4d5ffa52b9b5f2bf6e SHA-256: a8706aef0e4dcd67a18db8628f9419a532fb3c9159f06fc40a560847c8efde54
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 ttraff.com. This domain is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to '3d video software for pc free' and the malicious URL, suggesting a lure to download potentially unwanted or malicious software. The presence of numerous links and a malicious redirector indicates a link farm or SEO poisoning attack 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.com/pify?keyword=3d+video+software+for+pc+free
    • http://files.ctelcc.com/uploads/1/3/2/6/132681823/9914227.pdf
    • http://wonekis.bcwas.org/uploads/1/3/1/4/131454065/ruledugas-xogutakitozite-rosebu-kekerimobuvog.pdf
    • http://xefolaguj.holycrossderry.org/uploads/1/3/1/4/131407552/difewererizes-ketodafimemizam.pdf
    • http://files.farrellheatingandcooling.com/uploads/1/3/0/7/130739227/f27913e8.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/rasojimubusumapimaxino.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/fejuzedeki.pdf
    • https://cdn.shopify.com/s/files/1/0429/6530/3455/files/jeppesen_aviation_weather_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/caller_id_location_premium_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5271/files/tujako.pdf
    • https://cdn.shopify.com/s/files/1/0434/5528/3350/files/mixizotes.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3802/files/be_going_to_present_continuous_present_simple_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0443/8104/4902/files/teacher_centered_approach_definition.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/boosting_in_machine_learning.pdf
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/bounded_rationality_theory.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/jivafopomiziveraz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/ese_lightning_arrester_working_principle.pdf
    • https://cdn.shopify.com/s/files/1/0431/8491/4583/files/53256508377.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_off00006ab5.bin
2ddcbf0d3dd9dbd099b98f0e2286a805fe646a1dc7808671c2ab99f7d8645be7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB5 5336 bytes
font_01_sfnt_off00007cfd.bin
2672fa16323d7c66cf64b113d618372a11f8456be3f8cb2b5a5d1bedec9f3de7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFD 10204 bytes