Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccec00e85e68bf9b…

MALICIOUS

PDF

38.5 KB Created: 2020-08-23 19:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a143276a3ef284c280ea83ee7bd737ff SHA-1: 5dc8187d6b3989ef6af91a7d030a9380a946f881 SHA-256: ccec00e85e68bf9b33263fdb0ff8c4d2e0e93179fd750c5ff7d55381a9a963d9
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external links, suggesting an SEO spam or phishing campaign. The ML classifier also strongly indicated maliciousness. The embedded links, particularly the one to 'ttraff.ru', are likely part of a redirection chain to malicious 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=blender+3d+animation
    • http://files.calvinpres.org/uploads/1/3/0/8/130874101/3729122.pdf
    • https://cdn.shopify.com/s/files/1/0436/2466/1154/files/sample_words_attendance_tracking_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2917/files/1_8_of_24.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/70205249603.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/tugofi.pdf
    • https://cdn.shopify.com/s/files/1/0462/7922/9600/files/gpd_win_2_game_compatibility_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/33085148566.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54748680829.pdf
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/starbucks_supply_chain_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42820491308.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_off00005ab2.bin
3c7d361e70fd99e847760605a5e9fad5c206aaeb9b28ac31fe51d048284b5da0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB2 5008 bytes
font_01_sfnt_off00006b9a.bin
d0fe142384a65661b9991e9ec64600a8da4ebbf70965dfb02698566d2663728c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9A 9972 bytes

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