Malicious PDF — malware analysis report

Static analysis result for SHA-256 f169ad2c16b36740…

MALICIOUS

PDF

62.9 KB Created: 2020-08-10 12:41:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 768ae3831171d616298f7a9ca1297da4 SHA-1: 5b3d108b626ec8a9545478dec35a0b6da4ad6597 SHA-256: f169ad2c16b367403decae175e5304720bb99de582a6531700bdd7e15922347d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=electronics+and+communication+engineering+interview+questions+pdf'. This suggests the document is part of a link farm or SEO poisoning campaign designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains the same keyword as the malicious URL, reinforcing the lure.

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=electronics+and+communication+engineering+interview+questions+pdf
    • http://files.luhkiaunni.com/uploads/1/3/1/6/131636682/0589b340f0bec2.pdf
    • http://sipaboke.riveroflifechurchcu.org/uploads/1/3/1/6/131606490/6798507.pdf
    • http://files.intothewildinc.org/uploads/1/3/0/7/130738919/rumubarove_fukositokelomod_xasiluzepafag.pdf
    • http://files.joshjchoi.com/uploads/1/3/1/3/131382274/a36324c22.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gizazuvolabemonixodokij.pdf
    • https://cdn.shopify.com/s/files/1/0434/6707/9830/files/40559735704.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/93686222111.pdf
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/manimozomufefeperafavawe.pdf
    • https://cdn.shopify.com/s/files/1/0434/2674/2421/files/the_wish_list_barbara_ann_kipfer.pdf
    • https://cdn.shopify.com/s/files/1/0430/2559/6573/files/nba_2k13_cheats_code.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3062/files/27824605434.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/tikazosodogipaxonizeno.pdf
    • https://cdn.shopify.com/s/files/1/0432/8534/8510/files/krugman_wells_microeconomics.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/consumer_reports_used_cars_to_avoid.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_off0000b847.bin
5f940831ebff1fa4ccc3a005aa8f8f081cb010c81116369f8c581d2da3e7975d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB847 5708 bytes
font_01_sfnt_off0000cbad.bin
b1a9101414269a721b2c533e595d17479c6ff3a85c2bdc09200c2e3c647cf034		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAD 10196 bytes

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