Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3a65248b3a91933…

MALICIOUS

PDF

35.1 KB Created: 2020-08-11 15:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89c2be71682dc7a186987b54927dc15d SHA-1: 4a0372c1380ea9d94eff872f4e9775c159197a1a SHA-256: d3a65248b3a91933b461af6f405d87443b9a768280eb7846cab37d5ff9de0096
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This indicates a social engineering attempt to trick users into visiting a malicious URL under the guise of downloading a PDF. The document body is heavily obfuscated and contains the malicious URL, further supporting this attack pattern.

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.cc/pify?keyword=mixed+modal+verbs+exercises+advanced+pdf
    • http://tirubepis.reederang.com/uploads/1/3/1/6/131636725/lovupuwiwakezej.pdf
    • http://zimuju.ebyogi.com/uploads/1/3/1/4/131483281/9337097.pdf
    • http://files.cosmeticsupport.com/uploads/1/3/1/4/131409717/tusimun.pdf
    • http://files.scoutingadventure.com/uploads/1/3/2/6/132681698/pozuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/0801/6027/files/19127325506.pdf
    • https://cdn.shopify.com/s/files/1/0450/0317/8148/files/bosch_car_service.pdf
    • https://cdn.shopify.com/s/files/1/0448/5667/2418/files/convex_hull_python.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4750/files/59617785626.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8390/files/15506448084.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/32711082871.pdf
    • https://cdn.shopify.com/s/files/1/0429/1769/1559/files/types_of_sorting_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/mejix.pdf
    • https://cdn.shopify.com/s/files/1/0438/7323/9195/files/zolpidem_eurofarma_bula.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6853/files/96189306953.pdf
    • https://cdn.shopify.com/s/files/1/0430/3909/6986/files/tekulizutokuxemavani.pdf
    • https://cdn.shopify.com/s/files/1/0434/4161/9105/files/sure_universal_remote_app.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/how_to_make_stonecutter_minecraft.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_off00004a4f.bin
4d3dd505be272e6eea9fe45bb00542273c161783659e8404b12cf61f04d02c8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A4F 5576 bytes
font_01_sfnt_off00005d36.bin
0ff3c2144ae453adaedbb9f341735bd6ddab9682c09bf5c1a5bd3162e8bfc1cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D36 10056 bytes

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