Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ff130f6abed66f…

MALICIOUS

PDF

48.2 KB Created: 2020-08-09 14:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c71a858a41aaf81e6a3ca15494451be SHA-1: 3f50a91e981edb53ed3acdcd9b2ea0d5253b9288 SHA-256: a7ff130f6abed66fbcf46f7eb8481c06ceb15e4cca98990ad94c7d848d37c2b6
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to a known malicious domain. The document body text, though heavily obfuscated, contains the same lure as the primary malicious URL, suggesting an attempt to trick users into downloading potentially harmful content. The primary malicious URL is https://ttraff.ru/pify?keyword=wordly+wise+3000+book+8+answer+key+download+pdf.

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.ru/pify?keyword=wordly+wise+3000+book+8+answer+key+download+pdf
    • http://files.liamortiz.com/uploads/1/3/0/7/130738911/gogapilesa.pdf
    • http://files.volpris.eu/uploads/1/3/0/7/130775639/zudorulade.pdf
    • http://files.smallboatsalmon.com/uploads/1/3/2/8/132814024/bca7451b73.pdf
    • https://cdn.shopify.com/s/files/1/0440/6660/3158/files/61862251770.pdf
    • https://cdn.shopify.com/s/files/1/0435/2344/0792/files/tanofevi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/76491768465.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6519/files/mabekula.pdf
    • https://cdn.shopify.com/s/files/1/0431/0594/3701/files/rihanna_california_king_bed.pdf
    • https://cdn.shopify.com/s/files/1/0434/6868/5464/files/99196699973.pdf
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/actuarial_mathematics_bowers_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1162/files/38463719815.pdf
    • https://cdn.shopify.com/s/files/1/0433/6756/3418/files/56175932781.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/84691267266.pdf
    • https://cdn.shopify.com/s/files/1/0431/4877/1488/files/car_payment_agreement_letter.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_off00007d69.bin
f5b1972aa6101e0b026add83bda2898cab533c0e5e1f83168a23b8a12ea62d97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D69 5948 bytes
font_01_sfnt_off000091cd.bin
895a3a066bf375f1160ceddf8a2cd45b0f492b4e3d969b9f9cd50c72d5d74207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91CD 10024 bytes

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