Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e0799db488263e…

MALICIOUS

PDF

45.4 KB Created: 2020-08-31 00:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69163fc67aa666ffc565d871791ed5ab SHA-1: 2f6e0c5f05358bc190174f1a9a40c75cc9362c36 SHA-256: 13e0799db488263eaa35a64a8a363aaeafade0f381312929c9b3572680ba7a3a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the file is designed to redirect users to potentially harmful websites, likely for phishing or malware delivery.

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=conan+exiles+skimpy+armor
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/vumovagoxoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1936/9639/files/fajaxax.pdf
    • https://cdn.shopify.com/s/files/1/0437/3381/1351/files/books_every_high_school_student_should_read_before_college.pdf
    • https://static.usrfiles.com/ugd/b8c837_da0534fc26834392a6891e7b16b012dc.pdf
    • https://static.usrfiles.com/ugd/19ce5d_db1b3a118a9b459f86af30cdd5c9afff.pdf
    • https://static.usrfiles.com/ugd/5e8de6_b898a33cc69946c6bf99e5d535d686d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_53a242ddfb664530a6fc47c840efeb9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa38f5f508a34661a59de1469f72e0cb.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/42225572788.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/attach_files_online.pdf
    • https://cdn.shopify.com/s/files/1/0448/4674/3709/files/i_capture_the_castle_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/0144/4512/files/50620640143.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/65343810190.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_off0000730f.bin
5b58eef62776e8f9fd0589483d42d9281ab20287ea8f2809b93565e89fd2bf6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x730F 5104 bytes
font_01_sfnt_off0000845e.bin
4d9abe34618c76dd32bb81306ff33a0132aa6ed6da257a8f22ee15ed444c54a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x845E 10640 bytes