Malicious PDF — malware analysis report

Static analysis result for SHA-256 046f9ad1caab83fb…

MALICIOUS

PDF

39.5 KB Created: 2020-08-29 13:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a214b7d8204f5172a276e5cfccaae82a SHA-1: 93f83d197d2c1c45f4af28723e8cb4115e9f4c3b SHA-256: 046f9ad1caab83fbf456a9f2bc20e4169b0486fbefcb78c2a4f484774e81d7d8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a deliberate attempt to lure users to potentially harmful sites. While no scripts were extracted, the presence of numerous links suggests an attempt to drive traffic to malicious or deceptive content, possibly for phishing or malware distribution.

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.ru/wix?keyword=south+australia+fishing+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8517/6736/files/11610646718.pdf
    • https://cdn.shopify.com/s/files/1/0427/9956/2911/files/naruto_shippden_season_21_episode_21.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/34061468428.pdf
    • https://cdn.shopify.com/s/files/1/0437/3823/5031/files/the_history_of_cancer_epigenetics.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/rukexup.pdf
    • https://cdn.shopify.com/s/files/1/0452/5208/3869/files/divagawus.pdf
    • https://static.usrfiles.com/ugd/b8c837_29cc4f099a0f4d629efbc9cdbdbc87e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_900cc010e003427ea938ad855f92880b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c9de2977ed9473f9ca2104f0a1bf192.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad2c053ff0bc45418ff3f20fdb04f426.pdf
    • https://static.usrfiles.com/ugd/b8c837_89a15ef2bbdf4668aa61d531536b533c.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_off00005d55.bin
a35efa81ca8278d098add9fc9f0c00d31472b29934181d2c8655ace97697e6a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D55 5272 bytes
font_01_sfnt_off00006f33.bin
bd92dae0ad4f79dfff9a5d7b76f2430eb08a3982c01408c1a2bbc9a72ff3dff1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F33 10060 bytes