Malicious PDF — malware analysis report

Static analysis result for SHA-256 86508f9459c77588…

MALICIOUS

PDF

39.4 KB Created: 2020-08-13 23:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a894f6731df07869166b9d585d4c1662 SHA-1: c2ce15912d909adf2efef8274cb292e424e9f30e SHA-256: 86508f9459c77588102cab070d14ec55510f45445bf19e8defa60dedef9f4ac4
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a redirector. The document body, though heavily obfuscated, contains text suggesting it is a 'medical certificate form', which is a common lure. The embedded URLs, particularly the one leading to 'ttraff.cc', are flagged as malicious redirectors, indicating a likely attempt to deliver a second-stage payload.

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=medical+certificate+form++pdf
    • http://sinak.aafreda.com/uploads/1/3/1/3/131380177/acb3a5506ddb920.pdf
    • http://jarodo.mollybernard.com/uploads/1/3/1/8/131856725/xodowaparex.pdf
    • http://pagax.stantonmathclass.com/uploads/1/3/0/7/130776677/9523291.pdf
    • http://files.mayflowerofbillings.com/uploads/1/3/1/4/131437117/4528144.pdf
    • https://cdn.shopify.com/s/files/1/0439/9369/4366/files/mugoxuwu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6838/3641/files/89512712714.pdf
    • https://cdn.shopify.com/s/files/1/0430/7206/1591/files/xilemakuvelafagobuwap.pdf
    • https://cdn.shopify.com/s/files/1/0431/9097/6673/files/54596732276.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/mesa_que_mas_aplauda.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/41260078332.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/28480749952.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/12301097372.pdf
    • https://cdn.shopify.com/s/files/1/0437/5560/2078/files/jojunobujafudo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1806/6843/files/29810939158.pdf
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/50697672773.pdf
    • https://cdn.shopify.com/s/files/1/0433/2067/2409/files/22475719402.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/tozelikelusizu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0671/4268/files/jolly_phonics_story_books.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_off00005a25.bin
a3a946b6d767a4bf231a1d8910229a368a3e1fea546ede68e47d8b338c413bae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A25 5128 bytes
font_01_sfnt_off00006b7c.bin
755775dcac552271373d165b5a24512fff31178e0bff8b3701787b0739afbd8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7C 10584 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.