Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7786853e045dac4…

MALICIOUS

PDF

44.8 KB Created: 2020-08-05 11:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe6dee160df3f16ea55d99e3f5a7ce37 SHA-1: a427e474569671b039a4ab53842f20bb90badeda SHA-256: a7786853e045dac40bc89dc6ad88bd2d063800ef1fc1760a029b8669274da65e
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, contains the URL https://ttraff.cc/pify?keyword=critical+reading+and+writing+skills+pdf, which is likely intended to redirect the user to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector.

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=critical+reading+and+writing+skills+pdf
    • http://files.insidepassageseminars.com/uploads/1/3/2/7/132740291/vojidep-vodexe.pdf
    • http://files.firmfactoryafrica.com/uploads/1/3/0/7/130739348/f7f49708b14.pdf
    • http://files.robirie.com/uploads/1/3/1/4/131410007/4828545.pdf
    • https://cdn.shopify.com/s/files/1/0433/1061/2635/files/21415405729.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3813/files/tnpsc_answer_key_group_4_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/87919260388.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/zetowopitaxigipatukes.pdf
    • https://cdn.shopify.com/s/files/1/0440/5706/7685/files/14003611422.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/godikuka.pdf
    • https://cdn.shopify.com/s/files/1/0431/1118/6588/files/binondo_food_wok_map.pdf
    • https://cdn.shopify.com/s/files/1/0437/7555/7793/files/61686395390.pdf
    • https://cdn.shopify.com/s/files/1/0433/2742/2632/files/83185822361.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/63585491250.pdf
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/what_is_a_discord.pdf
    • https://cdn.shopify.com/s/files/1/0433/8299/7148/files/business_proposal_report.pdf
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/pabejotiguxarew.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_off00007170.bin
adfeacc808af915ab9ff2835c05671626e9113c2b4b5cb28840ff33eb67a951e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7170 5384 bytes
font_01_sfnt_off000083e4.bin
4d16599be8a6f846bcc44a660c217d77a2ace2f88d86722b1c8c5b244ba5608a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83E4 10012 bytes

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