Malicious PDF — malware analysis report

Static analysis result for SHA-256 d233fc56143c677f…

MALICIOUS

PDF

46.4 KB Created: 2020-07-31 12:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae316ec86227650b2e0ec59559ea2085 SHA-1: d18c241ef3e9d2ad75a2b6dda02b96d1bdf9decc SHA-256: d233fc56143c677f5a91fe34ff0e66bfe4c1fc6f14c9a895fedfad0e1328c318
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a link farm, indicating a likely attempt to lure users to malicious websites. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a keyword related to a diet PDF, suggesting a lure for users searching for specific content.

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.ru/pify?keyword=the+anabolic+diet+espa%25C3%25B1ol+pdf
    • http://files.ccvallevista.com/uploads/1/3/0/9/130969889/123c36e0739d0.pdf
    • http://files.cameracreationz.com/uploads/1/3/0/8/130813409/wegaxalok.pdf
    • http://files.nhbea.com/uploads/1/3/1/4/131407227/3100547.pdf
    • http://files.migueljuliobeauty.com/uploads/1/3/1/6/131636726/vapebexosazeval-mujakusawigofaw.pdf
    • http://files.nhbea.com/uploads/1/3/1/4/131407227/310054
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/lurugawitizejepuvojuwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2629/2629/files/74382174926.pdf
    • https://cdn.shopify.com/s/files/1/0438/4292/8790/files/repux.pdf
    • https://cdn.shopify.com/s/files/1/0440/8039/8486/files/potojip.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/jinemisulomujasabiwub.pdf
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/32656047576.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5503/files/jogaxubazuxufixozalo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/40985260203.pdf
    • https://cdn.shopify.com/s/files/1/0435/2419/4468/files/98204224279.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_off00007592.bin
7355d64c41118aca53ef8b734a0be44b07702b5c599ab967630a06e243a2513c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7592 5236 bytes
font_01_sfnt_off0000870c.bin
9a7ae3c5d83d8e9304a5bcdd41c8695af323f59da47e4a2ae946caa1e5d19b95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x870C 10532 bytes

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