Malicious PDF — malware analysis report

Static analysis result for SHA-256 5701cf6f3bf8ba25…

MALICIOUS

PDF

48.2 KB Created: 2020-08-11 16:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2518e6d3ff241309ebab5f9ac7200bbe SHA-1: 07556a3807713eabecee8f52d01e9adc02e459c9 SHA-256: 5701cf6f3bf8ba2505df6882a167916690069e21afec2e57ccf2b6b0f10e8b1c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=cadbury+report+1992+corporate+governance+pdf'. This indicates the document's primary purpose is to redirect the user to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=cadbury+report+1992+corporate+governance+pdf
    • http://files.northernwakeco.com/uploads/1/3/1/1/131164479/7406157.pdf
    • http://files.muzzlemagazine.com/uploads/1/3/1/3/131381614/95d2411f4.pdf
    • http://files.simposiomujereslatinas.com/uploads/1/3/0/7/130740196/vatozorifilexepadepe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/17026586414.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/fourier_analysis_stein_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0429/4495/4527/files/tadapomigomobozafosebudu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/nivegamuwubep.pdf
    • https://cdn.shopify.com/s/files/1/0435/0250/2054/files/tetirupowipu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/jiziwavilakesezifegeg.pdf
    • https://cdn.shopify.com/s/files/1/0447/3788/8410/files/cambridge_latin_course_unit_1_stage_tests.pdf
    • https://cdn.shopify.com/s/files/1/0440/9724/1240/files/11441443972.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/como_funciona_una_caldera_industrial.pdf
    • https://cdn.shopify.com/s/files/1/0441/3282/7288/files/8595240604.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/kayla_itsines_bikini_body_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/31384540173.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_off00007dec.bin
37a9cc1c10dc7dbcd1827ae25ba705753fc687c82f90754a19f84359ae37f140		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEC 5660 bytes
font_01_sfnt_off00009155.bin
52d3b73a8ff9f9ea4b4db25d4eef1841f9ac4d001395e8917735b4bcba9ce2cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9155 9984 bytes

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