Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3a709cd473c2c13…

MALICIOUS

PDF

47.8 KB Created: 2020-08-28 05:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a56740cdd80794c6191667b202ebdd51 SHA-1: a65bc4a55855a08362f85e7ccddde4e892293f74 SHA-256: b3a709cd473c2c13fe7fc781cb43f8fd8d89903bb5585ebbd35bfb9d781398e9
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. While many other links point to benign Shopify domains, the presence of the malicious redirector and the overall structure strongly suggest an attempt to lure users to a harmful destination. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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=anestesicos+locales+ppt
    • http://mexan.trimtags.com/uploads/1/3/1/6/131636725/bidapav.pdf
    • https://cdn.shopify.com/s/files/1/0440/6312/9765/files/sketchup_2016.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5901/files/ableton_live_10_crack.pdf
    • https://cdn.shopify.com/s/files/1/0440/6575/1192/files/dalipunaleradeborawuxubip.pdf
    • https://cdn.shopify.com/s/files/1/0440/3383/5173/files/functional_drink.pdf
    • https://cdn.shopify.com/s/files/1/0434/3401/6924/files/47671258148.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/tosemusababilorinarudo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/html_to._net_core_2.pdf
    • https://cdn.shopify.com/s/files/1/0436/9648/8613/files/xivevexowagolepevuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/9723/4338/files/1852686311.pdf
    • https://cdn.shopify.com/s/files/1/0432/5572/6238/files/gunonetezuf.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_off00007e26.bin
39098c0a82a8acee173eb9b1fa19c4069dee58838f95bb8e8bf56deeeb88a887		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E26 4820 bytes
font_01_sfnt_off00008e96.bin
8ccad63243f07167f43bd1a5837f24390f61bc480c5230749a52feabc600cd4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E96 10992 bytes

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