Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b9be50c7cf6fae…

MALICIOUS

PDF

38.5 KB Created: 2020-08-03 00:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6cf4fbf9747d660a443030e736f9066 SHA-1: 563e31e662dfa54f2d8536bcb0819d95422c7a8d SHA-256: 95b9be50c7cf6faead5d364257e239e5a497ec02a92df918e13bf89211d7433f
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external links, with the dominant host being 'cdn.shopify.com'. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector suggests the document's primary purpose is to lure users to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=dragon+ball+z+flashgames
    • http://files.koreanchurchofmemphis.org/uploads/1/3/1/4/131454106/vejirelap.pdf
    • http://files.sidemountainspecialtyfoods.com/uploads/1/3/1/4/131406520/popenigezalagos.pdf
    • http://files.beckywidschwenter.com/uploads/1/3/0/7/130739063/lebulefidojom_duzozufigef.pdf
    • http://files.bhpcd.org/uploads/1/3/1/4/131406827/918244.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4727/files/11853936183.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3880/files/vine_little_einsteins.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/padi_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8932/files/honda_eu2000i_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/4292/8790/files/rofumusejanudopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0842/6143/files/fubarewad.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3765/files/multivariable_calculus_rogawski.pdf
    • https://cdn.shopify.com/s/files/1/0439/4106/8958/files/reloading_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0431/9939/8052/files/wuxawizel.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/tajowifet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/pufadifesudigavuneze.pdf
    • https://cdn.shopify.com/s/files/1/0440/0611/3430/files/mulokubotizet.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_off000058ba.bin
587ab655438767c7722d999db6250b8926b45469a424cc28e4c05f66d15d395f
pdf-font-stream PDF embedded font (sfnt) at offset 0x58BA 5372 bytes
font_01_sfnt_off00006ae3.bin
8409e690191afc5bacb374cbd55269e087acbb438a850c2dec62c4f75a2634aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE3 10008 bytes