Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8199aff43ee51db…

MALICIOUS

PDF

63.6 KB Created: 2020-08-24 10:12:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4839993da0694288b6dd83ba290f0b74 SHA-1: ae1878c0c49cdbb1eaba11e6cb038064dbc7c603 SHA-256: e8199aff43ee51dbf251849414443379c7d0a6056566919bda94aa79c8df1e33
120 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 'https://ttraff.com/pify?keyword=adsorption+kinetics+pdf'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL, suggesting the primary intent is to direct users to malicious infrastructure under the guise of providing a PDF on adsorption kinetics.

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=adsorption+kinetics+pdf
    • http://files.marcellamar.com/uploads/1/3/2/7/132710704/8492976.pdf
    • http://files.firstxvperformance.com/uploads/1/3/1/0/131070389/2163678.pdf
    • http://zagipogow.thebeautyofpaint.com/uploads/1/3/1/8/131871721/7cf0812e.pdf
    • http://letibi.querubicamp.com/uploads/1/3/1/3/131383651/739b7834841e.pdf
    • https://cdn.shopify.com/s/files/1/0433/3849/8198/files/kituwajelifozebeb.pdf
    • https://cdn.shopify.com/s/files/1/0439/4542/7102/files/2497669038.pdf
    • https://cdn.shopify.com/s/files/1/0437/5560/2078/files/62791208842.pdf
    • https://cdn.shopify.com/s/files/1/0437/3626/8949/files/john_deere_ct332.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4846/files/asus_usb-_bt400.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/causative_verbs_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/44825663611.pdf
    • https://cdn.shopify.com/s/files/1/0437/8099/7269/files/tubumafatubeno.pdf
    • https://cdn.shopify.com/s/files/1/0437/5219/4202/files/45981941748.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a523.bin
0783f3604afe15f4b92984771b11cfc85367215d8f29100b4a9e1a1d51feaf74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA523 4960 bytes
font_01_sfnt_off0000b61c.bin
8fd00756787473696935dc36e2a61c14fa8c3e731442008dfef37dff8f12a37e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB61C 11196 bytes
font_02_sfnt_off0000dcaf.bin
f7282090e270060608fdc575ded0b184a97243f724fc845514d2e81390c10c7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAF 16144 bytes

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