Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8a4a8bfaf4f2d25…

MALICIOUS

PDF

43.3 KB Created: 2020-08-11 01:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88d419908e1f31493554bc9f32fc5817 SHA-1: 8ff22f090f5ce139182e3905913bc81c1334f01b SHA-256: b8a4a8bfaf4f2d25308601911ac3cc312873a78de701571a0fa5660b4acf9bb8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to what appears to be a link farm hosted on Shopify, designed to obscure the ultimate destination. One critical heuristic identified a direct link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body, though partially corrupted, contains text related to medical information and the tool used to generate the PDF, suggesting a lure to disguise the malicious intent.

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.cc/pify?keyword=causas+de+retencion+placentaria+pdf
    • http://wimiwumu.sweethartbaking.com/uploads/1/3/2/7/132740285/c1c818dc67.pdf
    • http://tawozeke.firsteatright.com/uploads/1/3/0/9/130969332/e77766695b57.pdf
    • http://files.mitch4constable.com/uploads/1/3/0/8/130874588/gobuko.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/food_and_beverage_cost_control_system.pdf
    • https://cdn.shopify.com/s/files/1/0438/4007/7986/files/pebasotewepoferi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8664/files/lodib.pdf
    • https://cdn.shopify.com/s/files/1/0437/1644/4315/files/togajugabafezitoxit.pdf
    • https://cdn.shopify.com/s/files/1/0437/0228/8537/files/767666631.pdf
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/29661970197.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/xutukomasudewukasevaduw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/xomekakelututiwebe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1811/7543/files/vefalokepefamoxamijozago.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9074/files/52715333500.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/58275860748.pdf
    • https://cdn.shopify.com/s/files/1/0433/7840/9622/files/pezikoterotejoxetidoral.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/futikogujojom.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_off00006af7.bin
02b215db971b77b6c30eea131f7ae663a42b3434d320440d4ab942706da6b412		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF7 5052 bytes
font_01_sfnt_off00007c2c.bin
27c9ed7ead649c5afede941d05af417ec6b27d7a66d0a73180c46cc5fddffd2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2C 10744 bytes

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