Malicious PDF — malware analysis report

Static analysis result for SHA-256 20eb73645eba3341…

MALICIOUS

PDF

43.2 KB Created: 2020-09-02 01:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2478ba17447b44b16dc541ce6f0e11d SHA-1: 1258f58453bf233e2d6880684659266b00a6aae9 SHA-256: 20eb73645eba334105ce3bc08935c650d1ba54dc907291bafcb447f88f5442db
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, likely for SEO manipulation to increase visibility. No scripts were extracted, but the presence of a malicious redirector URL is sufficient to classify the attack pattern.

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/wix?keyword=another+eden+living+green+fishing+guide
    • https://cdn.shopify.com/s/files/1/0431/9199/2480/files/dirt_devil_easy_steamer_deluxe_instruction_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56773010908.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1101/files/spondylosis_physiotherapy_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/9268/0605/files/vudabexekotame.pdf
    • https://cdn.shopify.com/s/files/1/0435/5057/2695/files/punjabi_movie_ardaas_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/44869044038.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1029/files/arrival_of_the_birds_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0437/7578/7162/files/91482041393.pdf
    • https://static.usrfiles.com/ugd/c3548c_e3405b2476d94839af71ebad03855655.pdf
    • https://static.usrfiles.com/ugd/b8c837_02deec101a184540a72652b7e16f61c5.pdf
    • https://cdn.shopify.com/s/files/1/0437/8276/6743/files/processus_de_certification_iso_9001.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/piwegun.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_off00006486.bin
060dae2a9dfb2587627046e70d1a110e48f4e41345ad0f2874ec5b3e8492bcf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6486 5008 bytes
font_01_sfnt_off00007599.bin
74fedc74ab6bb85873f8945c80b9491a64998d224c24dd0f518bcceb62bbb051		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7599 13444 bytes

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