Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2aa7510eeaafc7…

MALICIOUS

PDF

44.6 KB Created: 2020-08-02 03:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e1fdff7fe1eac1533d8cb5e7a96b9d5 SHA-1: e2b3c1c9f148b8548c81565fde86300daefc7ec5 SHA-256: cb2aa7510eeaafc793b9c4a762e1e52c46cf42f3f685a4900fbd5168f782b7c6
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The primary malicious URL identified is https://ttraff.com/pify?keyword=is+there+a+color+code+for+transparent. The document body, though heavily obfuscated, also contains this URL and other links to Shopify-hosted PDFs, suggesting a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious.

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=is+there+a+color+code+for+transparent
    • http://files.camilavesth.com/uploads/1/3/0/7/130738974/vedokuzadex.pdf
    • http://files.stcharlescatholicchurch.com/uploads/1/3/1/4/131437969/gezodasugikikupimere.pdf
    • http://files.osborntreeservicellc.com/uploads/1/3/0/9/130969879/nenubumij-kopovaruxa-pufanarajuna-piragigolix.pdf
    • http://files.vegasvoicelessons.com/uploads/1/3/1/8/131871488/newagono-pinuxid-lisejuzoselulet-nafedilajaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6551/files/easiest_test_ever.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/tojowifoxavovuluf.pdf
    • https://cdn.shopify.com/s/files/1/0440/6935/5670/files/pytorch_tensor_to_numpy.pdf
    • https://cdn.shopify.com/s/files/1/0436/1604/3168/files/28215290535.pdf
    • https://cdn.shopify.com/s/files/1/0435/4618/1787/files/besas.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9507/files/58365494873.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8703/files/52813136323.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/nupagogugowemenukenu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niborenegukudokeregus.pdf
    • https://cdn.shopify.com/s/files/1/0435/1901/7124/files/sapifajufon.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/53316115365.pdf
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/87697919269.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/xujabidesom.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1041/files/99315687783.pdf
    • https://cdn.shopify.com/s/files/1/0432/1030/9787/files/rasofatazorag.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_off00006602.bin
c10cb8d72719994f56265ace2f3d18f603abe17994d42a5b83b30fc2d42e4dbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6602 5180 bytes
font_01_sfnt_off00007796.bin
3d7c9ae685681f96a22e9ce106962c9d256a26085f7b0560d297da67ed0eb2f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7796 14348 bytes