Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e19d2ce9b3ad131…

MALICIOUS

PDF

56.9 KB Created: 2020-08-08 08:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 437176095715605fa2309f703105ba7c SHA-1: 9dd74a9b30002d51188aa9a10240319d5eb83d5b SHA-256: 8e19d2ce9b3ad131fa44e5e124c30d0ab9c15d37fa738893757a0df7e95e7d47
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to obscure the ultimate destination. The document body, though heavily corrupted, contains the string 'computer all full form pdf file download' and the malicious URL, suggesting a lure for users seeking specific file types. The presence of multiple links to external PDFs, some hosted on Shopify, further supports the SEO poisoning 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.com/pify?keyword=computer+all+full+form+pdf+file+download
    • http://files.the-hafizova-hive.com/uploads/1/3/2/6/132696465/dubalutul.pdf
    • http://files.jennawatt.co.uk/uploads/1/3/0/8/130813364/zatir_lelanunaxizofar_zagajukuvofek_sakotolubavov.pdf
    • http://files.garretreich.com/uploads/1/3/0/8/130814043/41492c966.pdf
    • https://cdn.shopify.com/s/files/1/0437/6579/2929/files/5680965032.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/62307445800.pdf
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/administrative_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0439/1193/8216/files/23786684403.pdf
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/53430780671.pdf
    • https://cdn.shopify.com/s/files/1/0438/3693/2253/files/nojetomogobur.pdf
    • https://cdn.shopify.com/s/files/1/0435/5840/4245/files/house_of_gold_uke_chords.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/learn_all_guitar_chords.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6216/files/vorevozedoguw.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/86986844401.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7917/files/zezukoremil.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8118/files/biduloxexatewibujate.pdf
    • https://cdn.shopify.com/s/files/1/0431/2943/8370/files/vijewoma.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007030.bin
a476d641525a41b3561ccd43f77667b23f7a41baed78be0bced213884580242d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7030 5004 bytes
font_01_sfnt_off0000812b.bin
a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x812B 3720 bytes
font_02_sfnt_off00008c83.bin
0f740872c9ba99ba2808e86ca1aa710947acf25eef927d3004a187dd3557d740		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C83 2092 bytes
font_03_sfnt_off00009629.bin
9acbcf6013450c1e2add351b97434583528df07e461c00a53eaff391ee854772		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9629 15172 bytes
font_04_sfnt_off0000c4eb.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4EB 4324 bytes

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