Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ec2141bc3a7ddf…

MALICIOUS

PDF

38.1 KB Created: 2020-08-07 18:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b769b978dea2a80c201fbc56887cca66 SHA-1: 01140cada2a831a04267b4638151ed499038788a SHA-256: c3ec2141bc3a7ddf0d85b788450064cf4a5524e01376c25d0fb265102af9b650
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=steve+awodey+category+theory+pdf, suggesting a lure related to academic content to trick users into clicking the malicious link. No scripts were extracted from this sample.

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.com/pify?keyword=steve+awodey+category+theory+pdf
    • http://files.mysmartinspection.com/uploads/1/3/1/3/131384335/funiduwifovimo.pdf
    • http://files.townofmeggett.com/uploads/1/3/0/7/130740165/rakotojuwijeg.pdf
    • http://files.deprofundisprods.com/uploads/1/3/2/6/132681579/8242172.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dokole.pdf
    • https://cdn.shopify.com/s/files/1/0431/5371/9452/files/sawakepowu.pdf
    • https://cdn.shopify.com/s/files/1/0447/7786/5367/files/bangladesh_bank_exam_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0433/3584/3994/files/87581019845.pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1750/files/41537829606.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1029/files/ajax_tutorial_point_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1572/4456/files/9422063998.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/37079778741.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/bodiripigunufigi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2968/files/64934114362.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_off00005594.bin
97b5e43c994f1b31e4a7fd61b0bfab85bb20068333b9ee114c791021bb311a2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5594 5564 bytes
font_01_sfnt_off000068a5.bin
26d7a3d871ba0700ed8dc38df76cbd4183d36841b46ad9e1ce6829819ca4f687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A5 10260 bytes

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