Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4b80b26c5252a29…

MALICIOUS

PDF

52.8 KB Created: 2020-08-20 07:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 419b245b16224ffb4326ed2684cf6435 SHA-1: 11bc1ede5ce2a2635c2b81afe3d692d84d2db0c8 SHA-256: d4b80b26c5252a29e6a51762f8f95bd1d94b4860acc9794a2bbbdbf18e7b732d
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same redirector URL and a Shopify URL, suggesting a lure to external content. The primary attack pattern involves redirecting the user to a malicious site via the embedded link.

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=name+meaning+in+tamil+app
    • http://files.nafsijewels.com/uploads/1/3/0/9/130969545/pobeles-soridopovofep-meden.pdf
    • http://files.rickstamalehut.com/uploads/1/3/1/1/131163578/xasaxiridunovuk.pdf
    • http://files.ryesnextchapter.com/uploads/1/3/0/7/130775668/valanipivis-radamagifotil-jojosevuvi-totofedafeja.pdf
    • https://cdn.shopify.com/s/files/1/0429/7631/3503/files/nujigavuxibixolutomererar.pdf
    • https://cdn.shopify.com/s/files/1/0432/4222/5832/files/pagimezagojir.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/34625581379.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/40934953618.pdf
    • https://cdn.shopify.com/s/files/1/0431/2943/8370/files/nubirote.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/emotional_intelligence_quotes.pdf
    • https://cdn.shopify.com/s/files/1/0435/0679/4656/files/56574114039.pdf
    • https://cdn.shopify.com/s/files/1/0433/7418/2563/files/33729022554.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000724d.bin
3635c158bbb3eb0f9f1e8c55a1c254c292d37271acf5b592ea289b27e7c6d651		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x724D 12396 bytes
font_00_sfnt_off0000631c.bin
94fd0b050d886daa76768d98bcd53d00951da723e27da310d68f01aedac59fb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631C 4512 bytes
font_02_sfnt_off0000921e.bin
b0d8e02ebf7d6b003f0ed6525ff6195bb30ca8a4b6cd8b7c345e2b3b08d760e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x921E 11336 bytes
font_03_sfnt_off0000b7a1.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A1 4324 bytes

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