Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e5500fdd624cb2…

MALICIOUS

PDF

36.5 KB Created: 2020-08-26 14:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f357716e091009749905e7c96c548f7f SHA-1: 35f5d27ea5c12e866b17ef7fb412cd55c8710d2a SHA-256: 14e5500fdd624cb2ee61c055234b64b4da370175c652af9f848e87bd0ac53425
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.me/pify?keyword=works+of+satoshi+kamiya+2+pdf. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external PDF links, many of which are hosted on Shopify. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be directing users to malicious content via the embedded redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/pify?keyword=works+of+satoshi+kamiya+2+pdf
    • http://files.upstreamprevention.org/uploads/1/3/1/0/131070294/memagozikabowor.pdf
    • http://files.ironoakcanyonranch.com/uploads/1/3/1/4/131407361/9bba2a29.pdf
    • http://files.lettymartinesdesign.com/uploads/1/3/1/3/131398292/vibijuwevugafeg_bikijeguzaxisox_rekositezipid_gawarokawido.pdf
    • http://files.lakehamiltonbaptistchurch.org/uploads/1/3/2/7/132740296/7409450.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/13776528521.pdf
    • https://cdn.shopify.com/s/files/1/0433/5465/2822/files/17605594493.pdf
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/70714164706.pdf
    • https://cdn.shopify.com/s/files/1/0463/0396/9437/files/akshay_kumar_movie_video.pdf
    • https://cdn.shopify.com/s/files/1/0439/3956/1630/files/vuxufusatej.pdf
    • https://cdn.shopify.com/s/files/1/0429/7103/7855/files/nukad.pdf
    • https://cdn.shopify.com/s/files/1/0429/2709/5967/files/58594212291.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/gozux.pdf
    • https://cdn.shopify.com/s/files/1/0437/9528/4130/files/franz_josef_glacier_guided_walks.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4930/files/fumajatomekikagalun.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000441c.bin
4e749ebcdc5e117c813f0c84bc837b23cf2f66ff58625d4de829d3ceb26cd5d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x441C 5124 bytes
font_01_sfnt_off00005599.bin
8f0a02231d51f0734399bc1afb4aa42a889176385ecbfbc766a6360681c657ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5599 9776 bytes
font_02_sfnt_off00007718.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7718 4324 bytes

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