Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afd7e2946f0e788…

MALICIOUS

PDF

40.4 KB Created: 2020-07-26 01:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 082e82f8bbcace1836b0102815473bec SHA-1: 30290582e7976373bc5f5fb2bd3a67bf72fcd426 SHA-256: 4afd7e2946f0e7887398c37f64491f2b641c0ef7bca3930cb9947b503ebe88b9
152 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to what appears to be a link farm hosted on Shopify, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is ttraff.com, which is known to host redirectors. The document body, though heavily obfuscated, contains text related to 'Formato cronograma de actividades sena' and application metadata, suggesting a lure to disguise the malicious links. No scripts were extracted from this sample.

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.com/pify?keyword=formato+cronograma+de+actividades+sena
    • http://files.obbagyconsulting.com/uploads/1/3/1/1/131164488/bafigi.pdf
    • http://files.ebonnyvonne.com/uploads/1/3/0/8/130814070/fezefoxo.pdf
    • http://files.5trt.org/uploads/1/3/1/1/131164043/5108090.pdf
    • http://files.ebonnyvonne.com/uploads/1/3/0/8/130
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/82028543426.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/30734000376.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11411440246.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9588/files/8186047656.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/91461991504.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xiguxalenagidofivixonagez.pdf
    • https://cdn.shopify.com/s/files/1/0430/9067/3813/files/lagujozupo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2916/8282/files/53461623906.pdf
    • https://cdn.shopify.com/s/files/1/0430/8572/5850/files/51227813642.pdf
    • https://cdn.shopify.com/s/files/1/0434/9001/7430/files/soxukadi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/55606694970.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/76055062489.pdf
    • https://cdn.shopify.com/s/files/1/0434/3404/9703/files/15251999958.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_off00005fa3.bin
159207d4476792a8d0d6daddf10b50e9a33290074d8cb98cd13dc9e295dfb997		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA3 5032 bytes
font_01_sfnt_off000070a9.bin
1a9ff9268551173cdaea61ef22424ad6da509cdb9d47c19045417b62075a1748		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A9 10480 bytes

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