Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c37ac76a9cc30cf…

MALICIOUS

PDF

39.1 KB Created: 2020-08-30 06:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d47ec9e86209897390f7b77daae87f2d SHA-1: b95b6db30d492f3061c40957451fe96d3707ed87 SHA-256: 6c37ac76a9cc30cfb0f7f2ea001f662e58e12e0f64d09414dca8fe6eb5321fb4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of embedded links, a common tactic for SEO spam or distributing malicious files. One of these links, https://ttraff.com/wix?keyword=johnny+cade+character+traits, is identified as a known malicious redirector. While no scripts were directly extracted, the PDF structure and the presence of malicious links suggest an attempt to lure users to harmful content, likely as a spearphishing attachment.

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=johnny+cade+character+traits
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2336/7335/files/83301621312.pdf
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/24271906430.pdf
    • https://cdn.shopify.com/s/files/1/0434/6678/4932/files/best_android_casual_games_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/9746/3714/files/gujajaxuzade.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0078/files/25992280596.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/48206620869.pdf
    • https://cdn.shopify.com/s/files/1/0435/6482/6783/files/harry_potter_5_trke_dublaj_izle_jet_film.pdf
    • https://cdn.shopify.com/s/files/1/0435/2904/4119/files/85899670620.pdf
    • https://cdn.shopify.com/s/files/1/0437/1070/9915/files/lyman_50th_edition_reloading_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/2712/8735/files/3997197151.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9382/files/40000684847.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/koketivegozuwofepo.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_off00005bd8.bin
0ff12f9d0277c5832aba861b84805ea02392be3b3e0c83f651c6efda2b7c1f41
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD8 5084 bytes
font_01_sfnt_off00006d19.bin
f61eddb95a899dde9b68789abbc194177c46244c7e9196ff67c318fbc9dfb3a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D19 10344 bytes