Malicious PDF — malware analysis report

Static analysis result for SHA-256 42207cddd87c38ba…

MALICIOUS

PDF

45.8 KB Created: 2020-08-11 14:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 512819e77b8297c6f2dcb9816509e444 SHA-1: 4b4a739e9e8f159b2e77a71b363241d0557b9a0a SHA-256: 42207cddd87c38bab5b0b1afb3dce4b5e41bab456fa416ef2275557b321cce20
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.001 Malicious Link

The PDF contains a high number of embedded links, many pointing to benign content, but one critical link redirects to a known malicious infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains keywords related to 'Toefl exam format pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous links, including the malicious one, indicates a link farm or redirector strategy.

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=toefl+exam+format+pdf
    • http://files.covid19atf.org/uploads/1/3/2/6/132696048/vosekosimerog.pdf
    • http://files.fraserlegendsfishing.com/uploads/1/3/1/4/131483305/vebodavu.pdf
    • http://files.byuiprearrivalmentoring.com/uploads/1/3/0/8/130813696/lewagolage.pdf
    • https://cdn.shopify.com/s/files/1/0437/4118/4165/files/blood_pressure_chart.pdf
    • https://cdn.shopify.com/s/files/1/0441/2515/9576/files/52034715074.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/24577149545.pdf
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/the_righteous_mind_full_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/6875/0998/files/28119997700.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/86914338026.pdf
    • https://cdn.shopify.com/s/files/1/0428/5687/4151/files/kuropijajofapusidulozu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2503/1590/files/76560534072.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75609531209.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/12550872952.pdf
    • https://cdn.shopify.com/s/files/1/0435/8003/1137/files/11930070932.pdf
    • https://cdn.shopify.com/s/files/1/0435/8298/0259/files/bugekodewut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdf
    • https://cdn.shopify.com/s/files/1/0443/6580/7772/files/python_language_in_urdu.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_off00007693.bin
af023439c9d462e3ef6f60ad46478909dc6f95637ee5c238e063fff4bd153c31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7693 5028 bytes
font_01_sfnt_off000087a2.bin
e27189d05eed97941623d23a01c1edcb1d541482e32814e438e8f412297d4ac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A2 10136 bytes

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