Malicious PDF — malware analysis report

Static analysis result for SHA-256 d016ed6d9914dfcf…

MALICIOUS

PDF

61.7 KB Created: 2020-07-28 08:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0e61dfc36c6ede757b2912b76974099 SHA-1: 658e9a620f7e22b551f96351ffcd660753db46d0 SHA-256: d016ed6d9914dfcf9653a81795ad3c880f79f549876cf594222ac801751b8daa
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it features a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation or distribution. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the malicious redirector URL, which is likely used to lure victims into a phishing or malware download site.

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=c.+a+foundation+course+information
    • http://files.pinkbehindthethinblueline.org/uploads/1/3/1/0/131070149/4407690.pdf
    • http://files.wifespiration.com/uploads/1/3/1/0/131070992/14dd5ac841.pdf
    • http://files.azioshsfi.org/uploads/1/3/0/8/130813714/9161358dadd53.pdf
    • http://files.solretapsychicreadings.com/uploads/1/3/1/3/131398555/3343533.pdf
    • http://files.ridingrubber.com.au/uploads/1/3/1/8/131856331/406ec1.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/39966886002.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1162/files/bezinubutijogajituge.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/526428265.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/9695068876.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9813/files/17300905333.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74535711799.pdf
    • https://cdn.shopify.com/s/files/1/0428/6231/3639/files/71676142599.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/buzutitofajosamavawoviza.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/rixokux.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009e30.bin
aa9d92b9d8352d9e0c8b215209fdcfe6c3f413a1780a64868d2a05ae963cc8b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E30 5072 bytes
font_01_sfnt_off0000af5e.bin
a5aa02bc57c27d7909ec930bc50bccb6ab68398ff6688d66052b1cad62fa449e
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF5E 10760 bytes
font_02_sfnt_off0000d41e.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD41E 16164 bytes