Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf0f709faf6053a…

MALICIOUS

PDF

44.8 KB Created: 2020-09-01 04:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ab4d73ce2b3998c9f75b2edcbdfc888 SHA-1: 27020976a7ad46660af041b64d6997e7b0a14552 SHA-256: acf0f709faf6053a7ecde7abc1ac8e20a2d1e89b83016579145bb84d21ea725a
160 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=linux+centos+commands+cheat+sheet+pdf', which is flagged as malicious. The presence of numerous PDF links suggests an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted from this sample.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/wix?keyword=linux+centos+commands+cheat+sheet+pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/63527903791.pdf
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/13323360171.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/getejesowute.pdf
    • https://cdn.shopify.com/s/files/1/0431/4261/1095/files/kifexenobometogutiruxez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0523/8692/files/bumelu.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6560a86dbcf4117848d2f1d9867529d.pdf
    • https://static.usrfiles.com/ugd/a298ce_608c29336f8c4d8cb73603161113db74.pdf
    • https://static.usrfiles.com/ugd/45fd81_dae546470e494328bb54535d7fc28236.pdf
    • https://static.usrfiles.com/ugd/81d6a4_cfbc4669458f4e11bf4c8ae433ae326a.pdf
    • https://static.usrfiles.com/ugd/9e41f0_b16af5483b3b4a7db17474ef7372b2e7.pdf
    • https://static.usrfiles.com/ugd/599026_a12ddeda852141748baee07fea3606eb.pdf
    • https://cdn.shopify.com/s/files/1/0437/4659/0872/files/xaweziwimim.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/newiponixaroguri.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/foxuponalagedewiwerar.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_off00006756.bin
093909cf2e2efc07ecce8d6a35a3ec2ccab9c1b5b854cc54408e535ad787c24b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6756 5276 bytes
font_01_sfnt_off0000792e.bin
d65d22ab46168108feb817856d30e3010dd1a4bfd33ac54715c9cbeb38b7f405		 pdf-font-stream PDF embedded font (sfnt) at offset 0x792E 14532 bytes

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