Malicious PDF — malware analysis report

Static analysis result for SHA-256 c75596600efb67f6…

MALICIOUS

PDF

43.0 KB Created: 2020-08-23 13:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad2e333d3bc0c3a4f8f358cb290b8b40 SHA-1: 7ac7d8581d1b0ccebfc952176f9851483519c910 SHA-256: c75596600efb67f6b7569507e71f7291ddf649c02a6bf3e3d4467a270275312a
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search results, with the primary malicious link pointing to 'https://ttraff.ru/pify?keyword=add+footer+to+worksheet+in+excel+2013'. This URL is identified as a known malicious redirector. The document body, though heavily obfuscated, contains similar text, reinforcing the lure. The presence of numerous links to Shopify-hosted PDFs suggests an attempt to blend in with legitimate content while directing users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=add+footer+to+worksheet+in+excel+2013
    • http://towejuzu.dallasadpi.org/uploads/1/3/0/7/130775386/ruwubew.pdf
    • http://files.shahnawazalam.com/uploads/1/3/1/8/131871720/lejugimemesuzed.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nowivozepax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sozolomunegodufedawugiwe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7955/5486/files/keguwiri.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/97021589051.pdf
    • https://cdn.shopify.com/s/files/1/0432/3665/5259/files/85512538052.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/vasone.pdf
    • https://cdn.shopify.com/s/files/1/0465/4166/8502/files/jukazokenolaxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/download_asmaul_husna_latin.pdf
    • https://cdn.shopify.com/s/files/1/0435/1465/8980/files/catan_cities_knights_rules.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gifowugebivagobawogun.pdf
    • https://cdn.shopify.com/s/files/1/0431/2586/6662/files/povemepovorononu.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_off00006a9e.bin
cf99b7c3cdbeccb1ddd3631d673393ab277a1226fb4b6c9baa6717ab814410f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9E 5604 bytes
font_01_sfnt_off00007dc8.bin
d32b8f4fad27ffa31b79ccd08e8db2889df86554a30b6d6e135f625f98fe1640		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC8 9808 bytes

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