Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f5bdfa9337c1d6…

MALICIOUS

PDF

32.5 KB Created: 2020-08-14 20:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6abd8a75c2825fd304e4982c4139ecfa SHA-1: 3140a6caba7b3be0531032890d336349cee28661 SHA-256: 92f5bdfa9337c1d63a796b2f3b383980852c29916f452b09d253c57aea10a8e1
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a mass of external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=harrison+cardiology+book+pdf', which is a known malicious redirector. This suggests the document's primary purpose is to trick users into visiting this malicious URL, likely for phishing or malware distribution. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=harrison+cardiology+book+pdf
    • http://files.groundedlearning.com/uploads/1/3/1/4/131455832/sateb.pdf
    • http://miwoz.ffpdonline.org/uploads/1/3/0/7/130738629/4465121.pdf
    • http://files.orangevalleycreations.com/uploads/1/3/1/3/131383510/bujofaketuwomidabej.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/37541038958.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5276/files/bsc_nursing_syllabus_mpmsu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4122/5880/files/danaxiw.pdf
    • https://cdn.shopify.com/s/files/1/0440/7682/6789/files/biochemistry_mcqs.pdf
    • https://cdn.shopify.com/s/files/1/0447/8310/8253/files/seeking_knowledge_in_islam.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/juxiganozaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1031/files/bodie_kane_marcus_investments.pdf
    • https://cdn.shopify.com/s/files/1/0434/4958/1724/files/gupipemuvorulu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/98655238866.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/18309989433.pdf
    • https://cdn.shopify.com/s/files/1/0433/3384/5150/files/principles_of_geotechnical_engineering.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_off000042fc.bin
2019d0b36c92ddbc5bc5ea3f33d13f8b2a36f085deb0bcbbbb3a373e2ee3ccce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42FC 5592 bytes
font_01_sfnt_off0000560e.bin
1caf4d4907425d319118c91ae4d154ef564a1b51b50742618247b9f217604a41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x560E 9236 bytes

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