Malicious PDF — malware analysis report

Static analysis result for SHA-256 056324b73285d4e6…

MALICIOUS

PDF

40.2 KB Created: 2020-07-30 03:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e4c73a36c1b128a35455de566ba8bd0 SHA-1: 998c26bd042c6bd37765ce153f0bd285f09b2f85 SHA-256: 056324b73285d4e6bd7ab557bf105d209b743d2f20f68198b09bf0c15d0c6e79
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file exhibits malicious characteristics, including a critical heuristic firing for linking to known malicious redirector infrastructure. It also contains a large number of embedded links, many pointing to Shopify-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness. While no scripts were extracted, the presence of numerous external links, one of which is a known malicious redirector, points towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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=active+and+passive+voice+questions+and+answers+pdf
    • http://files.mcdonaldelectrical.com/uploads/1/3/0/7/130740222/8929158.pdf
    • http://files.diguptheyard.com/uploads/1/3/1/4/131453588/tedalajowijipum.pdf
    • http://files.kairakunda.com/uploads/1/3/0/7/130739542/vixunu.pdf
    • http://files.stonehengebelleville.com/uploads/1/3/1/3/131384249/743322.pdf
    • http://files.rudisrescue.com/uploads/1/3/1/8/131856160/jikaba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/mofijidexulutotivomiwava.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/88286527190.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/87719944622.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/85168576567.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4495/files/wopagesosefofulob.pdf
    • https://cdn.shopify.com/s/files/1/0432/1060/4705/files/1889809466.pdf
    • https://cdn.shopify.com/s/files/1/0429/3866/3079/files/weniwisewuja.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/gekibefadimusetarosurerex.pdf
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/nolezogi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/babasetaxoguvivowe.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007259.bin
7e535af19895dadcefafe8b904b71ec192489591b00c854774ba2adaec0eb85f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7259 5264 bytes
font_01_sfnt_off00008457.bin
aef48e0f2d8d8fc169fa46eb8fdc09fba0015598657f5992e941db31e11ba60a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8457 10024 bytes

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