Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f72eb26d89ca09…

MALICIOUS

PDF

49.6 KB Created: 2020-08-06 17:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c099bcb9f54a17b74c80b1aa46e6e8e7 SHA-1: da489872bfffdfbe986dfca368a4166e10694fc3 SHA-256: c2f72eb26d89ca091a961aeb5f47bfee1a41701c9792e3e220fa79219b210d6a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=complex+numbers+mcqs+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one hosted on cdn.shopify.com. The document body, though heavily obfuscated, also contains the malicious URL and a benign-looking PDF title, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=complex+numbers+mcqs+pdf
    • http://files.educatorkellyhastings.com/uploads/1/3/1/4/131453387/8772.pdf
    • http://files.lbwalker.com/uploads/1/3/1/3/131384663/vidovijemoni.pdf
    • http://zanom.vohrart.com/uploads/1/3/0/7/130740596/rorakijab.pdf
    • http://files.americanfoursquare.us/uploads/1/3/2/7/132740218/majibomavapakabopi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/condominium_act_of_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0436/9675/0742/files/tuxazefigunorapolepukejoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/nawufidoti.pdf
    • https://cdn.shopify.com/s/files/1/0437/4459/2021/files/65514547274.pdf
    • https://cdn.shopify.com/s/files/1/0437/3613/7882/files/bticino_magic.pdf
    • https://cdn.shopify.com/s/files/1/0431/2301/5841/files/photosynthesis_and_cellular_respiration_crossword.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7070/files/63688804030.pdf
    • https://cdn.shopify.com/s/files/1/0440/8541/1990/files/1918537676.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/kuxoxarimigabozisasud.pdf
    • https://cdn.shopify.com/s/files/1/0437/2440/6933/files/chemistry_lab_apparatus_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/15440662775.pdf
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/feritotofudoxorexoj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b7b.bin
9489ceb24434387acb80e92f862c3ee056522d57db6d20ffd20c22eab121e8e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7B 5332 bytes
font_01_sfnt_off00007d7e.bin
844511e743f308a44d21324f3cc86f662654fbf0eee56321d94aa1ce05ccd169
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7E 11116 bytes
font_02_sfnt_off0000a3ea.bin
6bd36af83f9cecc02bf75f81bc30fb8c57b3c83693cec0e6e4b4820d6550c9bd
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3EA 16148 bytes