Malicious PDF — malware analysis report

Static analysis result for SHA-256 a443ce4196fdbd7a…

MALICIOUS

PDF

47.4 KB Created: 2020-08-30 09:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a20c6e6bb866bdc7b9fee6c05cd0d84 SHA-1: 21b176e8e4fbc625808cc143fe7219427f51943d SHA-256: a443ce4196fdbd7a147169fa111aed66b37285f97fa5bf98df5fbd6dad420ac6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is associated with a lure for downloading 'wolfquest amethyst mountain deluxe'. The document body also contains this URL and other Shopify links, suggesting a link farm for SEO manipulation or to host further malicious content. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves tricking the user into clicking the malicious link.

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/wix?keyword=download+wolfquest+amethyst+mountain+deluxe
    • https://cdn.shopify.com/s/files/1/0437/4996/5978/files/zineradifenulozotitumop.pdf
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/jurnal_behavioristik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/lidamopazigofagunudowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/coleman_ac_unit.pdf
    • https://cdn.shopify.com/s/files/1/0437/1536/2984/files/movanukibajimasakevef.pdf
    • https://cdn.shopify.com/s/files/1/0461/4334/0697/files/23218423681.pdf
    • https://static.usrfiles.com/ugd/07625c_2ccccedae7bc4757a9cebf042b4fa4ce.pdf
    • https://static.usrfiles.com/ugd/912de2_25f3ad26558a4b178dfc9e46667073db.pdf
    • https://static.usrfiles.com/ugd/136d07_ddfadf9102bc434898d366fcba5436e1.pdf
    • https://static.usrfiles.com/ugd/934fc3_7d94ba1461d34b2c8383f372b98f5d40.pdf
    • https://static.usrfiles.com/ugd/ea78e0_050b77478c0249c191cf37f1c645a4b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_173c99e94a0640a4accc19156c7143b8.pdf
    • https://static.usrfiles.com/ugd/07e02c_09c96de6d2754fd194a6d42e1cbf66ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_b027f97643334406a06a94311c84f926.pdf
    • https://static.usrfiles.com/ugd/409ca8_7837e894a4a947478374107735d52303.pdf
    • https://static.usrfiles.com/ugd/b8c837_237371fa5f2f4e8e9fd49616542333d7.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/
    • https://static.usrfiles.com/u

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a68.bin
642a2715925b92af05f51808835604b3d84a69d877bd7902482212deaefc1244		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A68 5320 bytes
font_01_sfnt_off00007c73.bin
48fcfdcf54f3514ca03d63acaadc45bf683b3a43af24d9f01d110c4bac6b1d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C73 10976 bytes
font_02_sfnt_off0000a1d3.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D3 4324 bytes

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