Malicious PDF — malware analysis report

Static analysis result for SHA-256 344ec055d2f1fd54…

MALICIOUS

PDF

44.4 KB Created: 2020-08-02 08:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c23a02d0e16114dbaf2d64dfc34b5c7b SHA-1: 3b6336e0164f26350ec5cae207a855a44069be3d SHA-256: 344ec055d2f1fd549174f7aa87507fbd09614a06d5e17e2416dc3fe59b66d087
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which are designed to mimic legitimate PDF files hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=don+omar+dale+on+dale', is identified as pointing to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and embedded URLs, suggesting an attempt to disguise malicious activity.

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.ru/pify?keyword=don+omar+dale+on+dale
    • http://files.ruralpunk.net/uploads/1/3/0/7/130739398/c90bd5c.pdf
    • http://files.mhecblacon.com/uploads/1/3/1/4/131437351/vasak.pdf
    • http://files.rwmassets.com/uploads/1/3/1/3/131379680/rosekesugi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/1021/9422/files/fujujewapawi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8129/3221/files/bepaxolapubenape.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2650/files/dularurovuvagumegenala.pdf
    • https://cdn.shopify.com/s/files/1/0434/4807/4396/files/48346755412.pdf
    • https://cdn.shopify.com/s/files/1/0431/0201/1548/files/tirelegudetetav.pdf
    • https://cdn.shopify.com/s/files/1/0431/7190/5698/files/74009071802.pdf
    • https://cdn.shopify.com/s/files/1/0435/8694/5187/files/seboxanusutuweje.pdf
    • https://cdn.shopify.com/s/files/1/0428/5949/5590/files/vumaxefufu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lajuvifubukakevo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/71946054395.pdf
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/89478456841.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_off00006512.bin
c455b09b9d359d5f3c92f1bcf1722cd6ad9ab6a8264de9c0ca2b0035350be5de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6512 4452 bytes
font_01_sfnt_off00007401.bin
363d71e54f8b6c66a296f3088781653ab25be1d85be4bb0cd84567737fd65034		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7401 10108 bytes
font_02_sfnt_off00009688.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9688 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.