Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2322a386c87c3f…

MALICIOUS

PDF

40.6 KB Created: 2020-08-17 17:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bb6f91cf6657e73ebe94043e75df56a SHA-1: 52cc63c85e557065b2491e94ad737842d3a1c783 SHA-256: 8f2322a386c87c3fe04e76b03e65ebe97339340a5d4a825d3cf9c9ddca0469f7
128 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a download for 'free printable literature worksheets'. This link redirects to a malicious domain (ttraff.com), indicating a phishing or social engineering lure. The presence of a large number of external PDF links, many hosted on shopify.com, suggests a link farm or SEO poisoning technique to distribute the malicious content. No scripts were extracted, and the document body is heavily obfuscated, but the primary intent appears to be redirecting users to malicious infrastructure.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=free+printable+literature+worksheets
    • http://kawer.dmawarenessmi.com/uploads/1/3/1/3/131384709/5759009.pdf
    • http://files.vettefinderjim.com/uploads/1/3/1/6/131636946/lawupumijeli.pdf
    • https://cdn.shopify.com/s/files/1/0430/9712/9109/files/allusion_in_poetry.pdf
    • https://cdn.shopify.com/s/files/1/0434/5584/0409/files/wizeporanep.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/suzavezobefodozed.pdf
    • https://cdn.shopify.com/s/files/1/0436/0765/4563/files/29134933841.pdf
    • https://cdn.shopify.com/s/files/1/0431/7269/2122/files/biosynthesis_of_saturated_fatty_acids.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/dapaguzezanew.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/78166803676.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/30638262548.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/jesus_ringtones_telugu_music.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_off0000620a.bin
2471a98eb8745de8c41666c3ee6114e71e96a7a99fcbc40f15c8e8824471c4e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620A 5156 bytes
font_01_sfnt_off00007396.bin
0a807e6c7093cabc182ca63fa57ca96f3796ae1b3f2c13d906a03869815a1992		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7396 10072 bytes

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