Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6305d21deadc3d…

MALICIOUS

PDF

42.1 KB Created: 2020-08-10 00:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0352ffecef026bb513cdd379e8fc6684 SHA-1: d3423d2d1677906550e6323bc761e86456b5330d SHA-256: 4f6305d21deadc3d3fe57ac64be04294bc67d22dafe175424df5d873c6e3b3cd
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for a technical document. The primary malicious URL identified is ttraff.com, which redirects to other content. The presence of a link farm suggests an attempt to game search engines for broader reach.

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=autodesk+vault+2020+handbuch+pdf
    • http://files.jakekalender.com/uploads/1/3/1/4/131406506/sijijifub-labikaris-xobajixurise-bonewepidel.pdf
    • http://files.initiatorum.org/uploads/1/3/0/8/130873732/mudobatoxes.pdf
    • http://files.longbeachjunkremoval.org/uploads/1/3/2/3/132302998/garojivorowulep-kupewol-minipipiba-jokovufajolig.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/petud.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7202/files/dunaxopixelebofeko.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6904/files/49100078480.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/mudadajobudamefuxakenefov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/8944/3483/files/66844777596.pdf
    • https://cdn.shopify.com/s/files/1/0430/6229/6725/files/viwinivugoxazukelan.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/xogadeturotaxapunosimu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/silipobefozadonalajo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/nokemajixipi.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_off0000659c.bin
c89eb1163109c915b98084f8a4ec01ab556ae165d5e6bfc9812a1622f5a70f5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659C 5672 bytes
font_01_sfnt_off000078f2.bin
39f6d8228358a5d2cc3b0835d9f3e94c2a792f9235f51612f7b0853f63d798eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F2 10288 bytes

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