Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2afd3c87cd67859…

MALICIOUS

PDF

100.2 KB Created: 2020-07-14 16:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fa8d833fd296bc5b4511701d33f4be6 SHA-1: 432252de6a62cf54d2d3615db0ea787c5e4c5c57 SHA-256: d2afd3c87cd6785945dfd870ed7618d337fe9be639c5d54a5c2647f2389e1fb7
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, indicating the document's primary purpose is to redirect users to malicious sites. The 'PDF_SEO_LINK_FARM' heuristic further supports this by showing a large number of external links, suggesting a tactic to distribute malicious content or engage in SEO abuse. No scripts were extracted, but the presence of numerous external links is sufficient to infer a malicious redirection attack pattern.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=medical+virology+pdf
    • http://files.theartofexperiment.org/uploads/1/3/0/9/130969811/jewisili_zezonovagijupu_fonidenodone.pdf
    • http://files.collagingdeafness.com/uploads/1/3/1/4/131437029/f1798cd6d719e.pdf
    • http://files.netkonnectus.com/uploads/1/3/2/6/132695865/7997293.pdf
    • http://files.popgalleryorlando.com/uploads/1/3/1/4/131453006/d2e1e0b9ff6d1fb.pdf
    • http://files.newleaforganizingllc.com/uploads/1/3/1/8/131857071/6418065.pdf
    • http://files.theatrewesthigh.com/uploads/1/3/2/3/132302764/7992458.pdf
    • http://files.chestervt.gov/uploads/1/3/0/7/130738562/f1ca2849c636.pdf
    • https://pogijebewumo.files.wordpress.com/2020/07/zavisuw.pdf
    • https://vitorufefu.files.wordpress.com/2020/06/40729666849.pdf
    • https://wipufib.files.wordpress.com/2020/07/88384819175.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/dowexujamujezovubov.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/18466078830.pdf
    • https://cdn.shopify.com/s/files/1/0434/3853/8904/files/fexodutaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/64201411964.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lexopiwalosadatijasaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/1389/8403/files/rujexusexuduxuzibarij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89647405972.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/wuramanef.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off000169e2.bin
02d362b4e3e86784d428e04e66e9a03d0cfddd7c63a7611160807f3bd916e612		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x169E2 17328 bytes
font_00_sfnt_off00013292.bin
c4b6c492edcbb560e07cccc315181e90ea0c3fc4f3aac266f642725a66b4ca2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13292 4916 bytes
font_01_sfnt_off00014368.bin
b9c598bdeb728f49b6ec51afd2d212109fa85c9afb63e1127466970a8bb44be9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14368 11504 bytes

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