Malicious PDF — malware analysis report

Static analysis result for SHA-256 37bee11960878927…

MALICIOUS

PDF

35.1 KB Created: 2020-08-01 22:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e715109fb611ac6fd4cb4cbfe9acab2 SHA-1: fdb34bb0b7b97cc2082ea1fc25ce35554ca818a3 SHA-256: 37bee119608789279dbfc0d2925afc8a7616bfbd0a1a19864fbdfd1d83d23962
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a fake invoice lure, intended to trick the user into clicking the malicious link. The link leads to a redirector that likely serves further malicious content.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=adp+check+stub+pdf
    • http://files.davidnakazono.com/uploads/1/3/2/6/132695629/0705c40a88471d.pdf
    • http://files.adsongsjingles.com/uploads/1/3/0/7/130775762/xovixeg.pdf
    • http://files.glospeycomputers.com/uploads/1/3/1/3/131384462/b8ebf2ecde90a.pdf
    • https://cdn.shopify.com/s/files/1/0437/7729/4485/files/minecraft_forge_1._13._2.pdf
    • https://cdn.shopify.com/s/files/1/0433/9220/4950/files/65307388886.pdf
    • https://cdn.shopify.com/s/files/1/0439/7491/8302/files/marisoxatab.pdf
    • https://cdn.shopify.com/s/files/1/0434/0524/6631/files/lalamonijigo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/sarodedibekigo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8893/6102/files/xepofevovaxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/40626367690.pdf
    • https://cdn.shopify.com/s/files/1/0440/5493/7765/files/96422329824.pdf
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/23530723264.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/66753869976.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/34812965628.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_off00004bac.bin
6069fce3f91c58021323c703c106e1d21e06ba396916375069ca9f1e19049b62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BAC 5100 bytes
font_01_sfnt_off00005d05.bin
1adfb82411aa4a7ef91e072c784d9b3af0b9e366fcb4fa13638c597d7353aad7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D05 10468 bytes

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