Malicious PDF — malware analysis report

Static analysis result for SHA-256 b966c7daf9b7e7e0…

MALICIOUS

PDF

44.7 KB Created: 2020-08-16 19:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aabdd5dc934f81a2d71ebefadbffe83e SHA-1: 4751f1b020edf6753e7c8821981e0ac213cde353 SHA-256: b966c7daf9b7e7e01df795d369ad7de4256278315d1a840b1d2e34ecd20ff9ef
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This indicates the PDF's purpose is to redirect users to malicious infrastructure, likely as part of a phishing or exploit delivery chain. No scripts were extracted, limiting the analysis of specific execution behaviors.

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.ru/pify?keyword=facebook+ads+template+free
    • http://files.rosevilleconnect.com/uploads/1/3/1/8/131856995/6631286.pdf
    • http://files.fccfrankfort.org/uploads/1/3/0/7/130739651/nupafularu.pdf
    • http://files.littlegemscreations.com/uploads/1/3/0/8/130874122/907901.pdf
    • http://renilu.sydniessweetlife.com/uploads/1/3/1/1/131164250/639989fc334.pdf
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/lutotixitanifo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6189/4565/files/sukokupumavigifozivuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/capacitors_and_capacitance.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/ludiginowotuzojexif.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/zowepozesefigufak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/suramagufumaxuragozud.pdf
    • https://cdn.shopify.com/s/files/1/0432/0310/0832/files/brain_anatomy_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/basel_ii_bcbs.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86662201832.pdf
    • https://cdn.shopify.com/s/files/1/0430/4814/0949/files/porigetefozufamoluk.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1547/files/bsf_tradesman_recruitment_2020_form.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_off00007042.bin
f310e63f2c588c04fb01f72c962846479e07c375db9285ec71ea0f73cfaf6bf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7042 5460 bytes
font_01_sfnt_off000082b3.bin
c81587822b21ceece0f2557e5e59d1583d230bafe73c92c4170d88e8c52db489		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B3 10212 bytes

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