Malicious PDF — malware analysis report

Static analysis result for SHA-256 31d14829b98eb3bd…

MALICIOUS

PDF

38.5 KB Created: 2020-08-15 10:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c9e612fcad0098edc3d6047f4d67731 SHA-1: 19b747605bb890880f3352d1d2eb0633a40fa4c0 SHA-256: 31d14829b98eb3bddd8dc8a49c1b804927d4be2c4f258e17bad7f3d3249678c7
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to disguise the malicious intent as a legitimate document. The presence of a link farm and a malicious redirector indicates a phishing or malware distribution attempt.

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/wb?keyword=cohen%20tannoudji%20quantum%20mechanics%20vol%202%20pdf
    • http://files.fifthandfederal.com/uploads/1/3/1/0/131070872/xawitejivolumamilawu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/hp_laserjet_pro_400_mfp_m425dn_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0434/3611/4076/files/kubota_parts_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/1680230414.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2283550224.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/mofogapidawizizuwo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/real_estate_broker_bill_format.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/73874008199.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/health_education_for_dialysis_patient.pdf
    • https://cdn.shopify.com/s/files/1/0435/9811/9071/files/8807884747.pdf
    • https://cdn.shopify.com/s/files/1/0430/0505/1029/files/meporitimutejiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/1922/2687/files/cambridge_latin_book_3.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_off00005792.bin
a8f0f69a30cf55c0ee7383e2b9a79c7c1bd420a531f1dc9071fbc5b4441013af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5792 5600 bytes
font_01_sfnt_off00006a84.bin
dd5732932cbf798377b61c4e2e46b9170137b90f04903b69d82f40407561f57e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A84 10300 bytes

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