Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c54145084cdba8…

MALICIOUS

PDF

84.7 KB Created: 2020-08-09 16:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15945cd2d256774546c87da08b3c7ad5 SHA-1: 44219fe5d0cb25fe279c4ed746c9526d17b69d32 SHA-256: 32c54145084cdba88c9211d5a5e4618f77cfcafb3ec18d576245e10d49987c67
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent to redirect users.

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.com/pify?keyword=priority+queue+algorithm+in+data+structure+pdf
    • http://files.teohanga.co.nz/uploads/1/3/0/7/130776821/6443791.pdf
    • http://files.embraceyouressence.org/uploads/1/3/1/0/131069764/memibov-verukebaf-redol.pdf
    • http://gezozekes.garnerfarmfresh.com/uploads/1/3/0/9/130969060/dexik.pdf
    • https://cdn.shopify.com/s/files/1/0432/2063/1720/files/fudevaju.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3567/files/93468457176.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/gedivikuzonitokuruju.pdf
    • https://cdn.shopify.com/s/files/1/0428/7853/3791/files/26881968597.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8567/files/sitiviruk.pdf
    • https://cdn.shopify.com/s/files/1/0438/0724/4450/files/38384829152.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/95958589834.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zeranosorijajigafa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/zojugozotuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/4028738471.pdf
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/23416843941.pdf
    • https://cdn.shopify.com/s/files/1/0436/4196/2649/files/71620564721.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/47159908508.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
font_00_sfnt_off0000b6c6.bin
702409a5dc9ad734e93737c3d7340a74a051abe73aa810dc3af262c7070a1fd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C6 16884 bytes
font_01_sfnt_off0000ecb4.bin
07bb729b0a956610b8925590be2c58aa8e91383ccba970100ad851085303950f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECB4 5796 bytes
font_02_sfnt_off0001004c.bin
127f97e3a2835ffc360de027a99a0031713e913dd7ae5f71a1f4b07a0529cec0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1004C 14492 bytes
font_03_sfnt_off00012e0b.bin
bf8ddf40a50930da14fac0122bf8c33235b606e88723a31516bd6b166a7521ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0B 16532 bytes

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