Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f7db2f3272e4fe…

MALICIOUS

PDF

42.2 KB Created: 2020-08-10 08:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0b60d3a9a6636734b72f308b7084387 SHA-1: 3722605e915ae5980adaa80179f6fe721aed30b1 SHA-256: 58f7db2f3272e4fefb3f5164c82d5a13c158c54cfe22b4644dfeb7b6edd44715
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that is disguised as a document about "Flubber movie questions and answers pdf". The link points to ttraff.cc, which is flagged as a malicious redirector. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning attempt to mask the malicious URL. The ML classifier also strongly indicated maliciousness.

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=flubber+movie+questions+and+answers+pdf
    • http://files.hrcesocialstudies.ca/uploads/1/3/1/8/131856430/terovuk.pdf
    • http://files.7drumcity.com/uploads/1/3/0/8/130813639/6636661.pdf
    • http://files.saiboutiques.com/uploads/1/3/1/0/131069899/d9bfe7.pdf
    • http://files.sdesignsgraphicarts.com/uploads/1/3/1/4/131453543/5e566.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/sixelikuvufivagaperijowev.pdf
    • https://cdn.shopify.com/s/files/1/0435/4496/9367/files/26033765317.pdf
    • https://cdn.shopify.com/s/files/1/0447/2917/2122/files/solving_quadratic_equations_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8474/files/46949884548.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/miwomamunulaze.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/bcom_computers_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/gikalosetofed.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3920/files/97730594207.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wudogezemolajefenupil.pdf
    • https://cdn.shopify.com/s/files/1/0431/9733/3668/files/97039094625.pdf
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/tetetebagulevazu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/futukikeliviwowiborebov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.pdf
    • https://cdn.shopify.com/s/files/1/0431/2878/3002/files/fatesojubir.pdf
    • https://cdn.shopify.com/s/files/1/0433/1683/8558/files/72295949332.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_off00006729.bin
e624d8d272db3b3fa3dd38e539a3a77706e588f618cc6a3943dbb6fc5012ae5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6729 5560 bytes
font_01_sfnt_off00007a07.bin
f807e37433fd0ebf8117bb35198e5a1d75da4fc0562018bc68d945a3b6313ff0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A07 9840 bytes