Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7bf90ca2763a044…

MALICIOUS

PDF

38.2 KB Created: 2020-08-14 00:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 834bf8a4fc47daae3488950e324badf9 SHA-1: 8524882e07a3aee7788492a31994ad65f30a569e SHA-256: c7bf90ca2763a044e97eccb7a0e638e578dd79aed39980f68c21779aa00e7114
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The primary malicious URL is reconstructed from the document's embedded link actions. The document body contains garbled text but includes the malicious URL, suggesting a lure for users to download or visit a malicious resource.

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=corpse+bride+piano+duet+music+sheet
    • http://files.edhgs.com/uploads/1/3/1/4/131408529/lujaremokike_nezuki_derunelizaxeti_kelabij.pdf
    • http://files.howsafeisourcare.com/uploads/1/3/0/8/130813997/desosibinalib_dapurivekobumi.pdf
    • http://files.mtzinsurance.com/uploads/1/3/1/3/131383384/b68ff563c58c344.pdf
    • http://files.metamorphosskincare.com/uploads/1/3/1/4/131438180/3311552.pdf
    • http://files.karsonbotts.com/uploads/1/3/1/8/131856173/e103230.pdf
    • https://cdn.shopify.com/s/files/1/0438/5649/4757/files/14013087417.pdf
    • https://cdn.shopify.com/s/files/1/0431/1321/8210/files/kegiruvititukom.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/angle_relationships_worksheet_2_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/8889/6415/files/85471134086.pdf
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/water_pollution_seminar_in_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/regularization_machine_learning.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/dokokosulitaxalegumupaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/siwop.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/rurakajukiwozanuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/5032/6426/files/rufirofevisonuposipapimu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4925/4048/files/48317483797.pdf
    • https://cdn.shopify.com/s/files/1/0440/8773/8533/files/rifts_sourcebook_1.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojedeteremedadedarovir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dilos.pdf
    • https://cdn.shopify.com/s/files/1/0429/4482/3452/files/diribibunemaxurif.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_off0000579c.bin
583fbdfb1c6140ab69e853b2b2d4b397f5ece7cc4b14db9b2f3b5b60b49e95bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x579C 5328 bytes
font_01_sfnt_off0000697a.bin
34e6e1a8d29d01f846df60afec99112948805269095d96595a38236fccc872ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x697A 9896 bytes