Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22d2b2b76a9d4e5…

MALICIOUS

PDF

46.3 KB Created: 2020-08-11 04:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4047cffc66a91697a7f75788965216ac SHA-1: 483cafac6e2fb2b3c3e0d2632f61ffd8ff31531a SHA-256: e22d2b2b76a9d4e5a61a0ed65c6c11a7091fbccf8b87191ecdd63f25fae9da5e
120 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector at 'https://ttraff.com/pify?keyword=cambridge+english+test+c1+pdf', disguised as a Cambridge English test. The document also functions as a link farm, pointing to numerous other PDF files hosted on various domains, likely for SEO poisoning or to distribute further malicious content. The heuristics indicate a critical finding for a malicious redirector and a link farm.

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=cambridge+english+test+c1+pdf
    • http://files.spiritual-research-network.com/uploads/1/3/1/8/131856046/2492982.pdf
    • http://files.spiritswithjen.com/uploads/1/3/1/3/131398059/7c2c5c24b29.pdf
    • http://files.w-sindustrial.com/uploads/1/3/0/7/130738764/3d0994.pdf
    • http://files.jasonsmithendo.com/uploads/1/3/1/8/131871424/bapoterike-nedodosi-zijesekeruxen.pdf
    • http://fisowojed.thecameracart.com/uploads/1/3/1/3/131384169/a3f2407dabab5.pdf
    • https://cdn.shopify.com/s/files/1/0431/0617/3077/files/julian_kal_seinfeld.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0460/files/sezodudamobaretitop.pdf
    • https://cdn.shopify.com/s/files/1/0427/6187/9719/files/logajigiro.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/98771984191.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0412/files/adverbial_particle.pdf
    • https://cdn.shopify.com/s/files/1/0435/5552/0667/files/10438197329.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0579/files/tenor_saxophone_arpeggios.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0856/files/64962166008.pdf
    • https://cdn.shopify.com/s/files/1/0437/9767/6192/files/amadeus_itinerary.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/malaria_parasite_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/2843405748.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/
    • https://cdn.shopify.com/s/files/1/0432/9200/0412/files/adverbial_particle

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071ec.bin
77310a00e3ecab25dcdce89e0a57f8eedb41cb68d15f7b7ec0e1425e63316770		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71EC 5668 bytes
font_01_sfnt_off00008508.bin
4bb3e895a5eac1d35dcadddadc65d70bdd71bb07b51f4d114aca9b3c70cf151a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8508 11364 bytes

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