Malicious PDF — malware analysis report

Static analysis result for SHA-256 38aacb2fad1c0bb5…

MALICIOUS

PDF

56.0 KB Created: 2020-08-23 16:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d14df399b69b5077b6062d7e80a7b8e SHA-1: ba4c742b11f48e782b9ecae05ee8565d9415bf6c SHA-256: 38aacb2fad1c0bb51d4b2f86fd7509c4c6ca82f3d7a2a514048514984490b191
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL identified is https://ttraff.com/pify?keyword=vb.+net+vs+c+performance, which likely serves as a redirector to further malicious content. The document body contains obfuscated text and the identified malicious URL, suggesting a lure to a phishing or malware distribution site.

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.com/pify?keyword=vb.+net+vs+c+performance
    • http://files.yogastuddstudio.com/uploads/1/3/2/6/132681985/8126555.pdf
    • http://files.barrierfreebuildingdesignpartnership.com/uploads/1/3/2/7/132710603/wokopijaridav-lajetuzamewigel-nuvejilemibo.pdf
    • http://banaja.natalieletsa.com/uploads/1/3/1/1/131164250/xawokepenabonujiw.pdf
    • http://pewosim.vowswithangie.net/uploads/1/3/2/6/132681946/walaboj.pdf
    • https://cdn.shopify.com/s/files/1/0462/2453/9802/files/zapesa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4018/6279/files/88800015493.pdf
    • https://cdn.shopify.com/s/files/1/0434/1674/8188/files/rogamamafivewe.pdf
    • https://cdn.shopify.com/s/files/1/0440/4389/4934/files/priority_order_of_functional_groups.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/jafolulure.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/zupupitawazawuzijipetuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/75419803622.pdf
    • https://cdn.shopify.com/s/files/1/0437/2096/6298/files/82403380980.pdf
    • https://cdn.shopify.com/s/files/1/0429/6438/5951/files/zegofufagutakiwomavewox.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_off00009cf0.bin
d3126bc9aefd54b042fe905c019258d600b3266e8972d1bdeea1f10ffc328e0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF0 5328 bytes
font_01_sfnt_off0000af03.bin
285588dd1957b0db42dd08ead87748010891538a639dda2a636bc114a7eacdcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF03 10508 bytes

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