Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b3a04e627686e5…

MALICIOUS

PDF

48.2 KB Created: 2020-08-07 15:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 994d64faef6b3fef1e258839e4c038d7 SHA-1: a6bc2261e73b0d343577bf4a9eb95ab178857b5b SHA-256: e1b3a04e627686e54598c61748f0e548a8aa4defd38f34abd8deb6854acfa0d6
150 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'. The document body, though heavily obfuscated, contains text related to 'Amiodarona injetavel hipolabor bula pdf' and the malicious URL. The PDF also contains a large number of external links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure the true destination.

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.com/pify?keyword=amiodarona+injetavel+hipolabor+bula+pdf
    • http://tapukexi.decadesboutique.com/uploads/1/3/2/6/132680813/koxizonovizewefu.pdf
    • http://files.simhaco.org/uploads/1/3/2/7/132740743/836543.pdf
    • http://files.scstagelighters.org/uploads/1/3/1/4/131412558/609404.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89832202682.pdf
    • https://cdn.shopify.com/s/files/1/0436/5965/7374/files/97272512252.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/6828138065.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/85425633142.pdf
    • https://cdn.shopify.com/s/files/1/0434/2792/2076/files/zesusu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2402/1664/files/72944102079.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/91202225735.pdf
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/jolojadugedalit.pdf
    • https://cdn.shopify.com/s/files/1/0432/2885/6477/files/vukuxan.pdf
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/84972660181.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3485/4051/files/13562167256.pdf
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/kowesonutubozaluzi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/gotagozagazimumub.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_off00007e66.bin
b4f8acf014d9cd994c0b0a107bd1d6d7cdfb3c5abdd28c04dc3b29dc687ef5b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E66 5368 bytes
font_01_sfnt_off0000907e.bin
5a37afe081d2edf9fd03d17328c942ea0050aadc666630943b11715215daba75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x907E 10280 bytes

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