Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d4787011a7ea28…

MALICIOUS

PDF

43.0 KB Created: 2020-08-31 02:39:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44db861915b13bf7942d59dcd2124782 SHA-1: ad4a9af8ad672675873fb1bad429786d278c33b7 SHA-256: 12d4787011a7ea28d4539f6ef94985127d1b62bf11419ed8221171205dde20ec
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the text 'Purse scavenger hunt checklist' and the malicious URL, suggesting a social engineering lure. The presence of numerous embedded links, including a link farm, further supports the malicious intent of redirecting users to potentially harmful sites.

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/wix?keyword=purse+scavenger+hunt+checklist
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/affb4a_eb83ae5253724bcfbfbe6dc00bba8878.pdf
    • https://static.usrfiles.com/ugd/3dd68e_e9f217ea1aa44908a9841572efe3415e.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf32e965c29a4c1f94fa09da9f7de94e.pdf
    • https://static.usrfiles.com/ugd/e6092c_7a64873da85a4296b55de36236943ea9.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d7425bf95024aba844d450280d229c2.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/pacific_ocean_map.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6518/files/kikogij.pdf
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/9255073393.pdf
    • https://cdn.shopify.com/s/files/1/0438/2638/0960/files/niredikudamifamilira.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0481/files/vigantol_bayer.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2056/files/figosojudoriwuseguki.pdf
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/66521182960.pdf
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/77207711624.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000694f.bin
5a201dec801afc7936ff536c7182d5914b9b42fb7dbf550e979aed49cfe88e81
pdf-font-stream PDF embedded font (sfnt) at offset 0x694F 5184 bytes
font_01_sfnt_off00007aea.bin
3e8663b8d4e315ce85a7de2b1b1b85fca318126fbee3017fe8587e34887fd807
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEA 10580 bytes