Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6e0fc8a64a4b50…

MALICIOUS

PDF

51.6 KB Created: 2020-08-29 07:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f236904d3d0a4803a7faff6aee855063 SHA-1: 2f238013a4ec5fd3aa20e62af4c472a0b0cb087b SHA-256: eb6e0fc8a64a4b50cdb4653177501e4e0809396ea95546fb24a7a5a914c59a0c
152 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through seemingly benign documents. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

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.cc/wix?keyword=wisconsin+v+yoder+ap+gov
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wirokole.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/wijujaliwidufiwibitub.pdf
    • https://cdn.shopify.com/s/files/1/0434/7333/8533/files/75107165841.pdf
    • https://cdn.shopify.com/s/files/1/0440/8393/7432/files/62524738771.pdf
    • https://static.usrfiles.com/ugd/b8c837_e73045bc16334da59d27fee98e5428c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_2863a4281c654086a1442c871ca674b3.pdf
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/muwefumabatid.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/universal_immunization_schedule_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/1578/2045/files/account_opening_form_of_sbi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6235/files/sotoratofud.pdf
    • https://static.usrfiles.com/ugd/b8c837_627f96bf1c454a9d8d855841d8b2b7e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_a538c46f3e7540e2b482ad1377d0217a.pdf
    • https://static.usrfiles.com/ugd/b8c837_0509c4930e4f42fbb07dcd56a78f5ac6.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_off00007f58.bin
ba6115789f2cf7a0a094a74ad9f645eed330397db1dc6f649872b4e40044f83d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F58 5092 bytes
font_01_sfnt_off000090b7.bin
5c5ec26111e65349ab0dee69f067a82914f3a3f872223c0520a24c4a91d8ee33
pdf-font-stream PDF embedded font (sfnt) at offset 0x90B7 10240 bytes
font_02_sfnt_off0000b3bf.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3BF 4324 bytes