Malicious PDF — malware analysis report

Static analysis result for SHA-256 a844fdc297a04466…

MALICIOUS

PDF

36.8 KB Created: 2020-08-01 16:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53b2be64fda5bdef19674bcd7c35f7cb SHA-1: dbfd413c7dcb20b2713c6948a08b58113bc81d24 SHA-256: a844fdc297a044662f4e2bf6e5806e856c4037e8c32220d8c8f66ac900fce60a
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate downloads, but the primary link redirects to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'https://ttraff.cc/pify?keyword=engineering+economic+analysis+12th+edition+pdf+online', indicating the lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a SEO poisoning or link farm tactic to distribute malicious content.

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.cc/pify?keyword=engineering+economic+analysis+12th+edition+pdf+online
    • http://files.smartstartdriving.ca/uploads/1/3/1/0/131071164/sanugofo_zimesepap_lusizojirabu.pdf
    • http://files.intimatesmallweddings.com/uploads/1/3/1/4/131436980/1752441.pdf
    • http://files.holsworth.net/uploads/1/3/1/3/131384674/vudaxanuruvo_zozifovakuk.pdf
    • http://files.mexpup.com/uploads/1/3/0/8/130814043/1709668.pdf
    • http://files.mauileathersmith.com/uploads/1/3/1/4/131482946/2483629.pdf
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/vetemidetixojatopuxowome.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5622/6716/files/wowegobib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/nirasuje.pdf
    • https://cdn.shopify.com/s/files/1/0434/5144/9496/files/92824489801.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/runebazuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6504/1311/files/nodirarokagutej.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/dugufe.pdf
    • https://cdn.shopify.com/s/files/1/0438/2215/3890/files/zuvawakufadaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8773/files/kingdom_heart_1._5_remix_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/rururu.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_off00004f85.bin
6a3eb87cc226dc37cd8c3eb9fb2dbc12afe5f061a31cfdf023258cd8d155616f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F85 5812 bytes
font_01_sfnt_off0000633b.bin
a49b288412d7f8a554f75211b47df59c8f713882a80de776dd9b0aea263bc29f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x633B 10200 bytes

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