Malicious PDF — malware analysis report

Static analysis result for SHA-256 22712bd5677c6ddf…

MALICIOUS

PDF

36.4 KB Created: 2020-08-30 22:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34072efb9f5d2964838c213bfc279d81 SHA-1: b3f8f4a659d4c25cd010c4e65065d18085d38ca7 SHA-256: 22712bd5677c6ddf62662bcee69596e36adf0e5d832cd65bdef7824ce4689cd8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of embedded links, many of which point to other PDF files hosted on Shopify and static.usrfiles.com. One of these links, https://ttraff.com/wix?keyword=fallout+4+cyberdog+mod, is identified as a known malicious redirector. This suggests a link farm or redirection attack designed to lead users to malicious content. The ML classifier also strongly indicated maliciousness.

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=fallout+4+cyberdog+mod
    • https://cdn.shopify.com/s/files/1/0433/6563/0102/files/guponenomu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31903895201.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/42310283499.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7252/files/tagovupatozajifuze.pdf
    • https://static.usrfiles.com/ugd/b8c837_8346e753212544c4a081fe7a97d82b1e.pdf
    • https://static.usrfiles.com/ugd/ee4a13_8a74f7e72ee44811922b853930a9b054.pdf
    • https://static.usrfiles.com/ugd/7f929b_404fe8d2d3e94c29a22841d58cf8cd64.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6ad5c6885594950ac3b8735acf93018.pdf
    • https://static.usrfiles.com/ugd/a107db_f9bd6b6b6d204ca1b3461723ae61050d.pdf
    • https://static.usrfiles.com/ugd/f8de3e_5f6dc259a8ff487c806ae1a652a8b622.pdf
    • https://static.usrfiles.com/ugd/2f7815_792978f2d7bd4d6ba3d30f97b834205c.pdf
    • https://static.usrfiles.com/ugd/b88e3d_9aa240edf73440a1950a9cc845356a24.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000514a.bin
7f0ef773bd85625074a6552dc871e7fc132463477937c69e03cfe0fdc7151474
pdf-font-stream PDF embedded font (sfnt) at offset 0x514A 5368 bytes
font_01_sfnt_off0000637e.bin
513bda94a29dbba4aa789c3e909362f74ba0635c0617d2e1d7dde58dea9da58f
pdf-font-stream PDF embedded font (sfnt) at offset 0x637E 9888 bytes