Malicious PDF — malware analysis report

Static analysis result for SHA-256 d083ee3b570dc985…

MALICIOUS

PDF

42.8 KB Created: 2020-08-29 17:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ceef99655d2b872216b39a74a532ebdf SHA-1: 3fed437ab75a94e6a801dbb0d9798a06ac7fcf93 SHA-256: d083ee3b570dc985ecd59ac3212a8fd98fa9f61c19afe76f69efc0e8b451209b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains references to the URL and appears to be a lure related to product specifications. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a spam or SEO poisoning campaign.

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=hp+pavilion+dv9000+specs
    • https://cdn.shopify.com/s/files/1/0428/2744/8476/files/colossus_the_forbin_project.pdf
    • https://cdn.shopify.com/s/files/1/0434/1940/2405/files/25860635096.pdf
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/9327742172.pdf
    • https://cdn.shopify.com/s/files/1/0434/6436/0100/files/sawawujok.pdf
    • https://static.usrfiles.com/ugd/b8c837_83c5373fc5d64ba291e8a946c9725520.pdf
    • https://static.usrfiles.com/ugd/353d00_d9a5a0bb9faa4d5aa6877ce48e42b109.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d3b63bcdbf74a9598dfa35d38f729b7.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_83fc0f75b38245338e87e533be8e6a3c.pdf
    • https://cdn.shopify.com/s/files/1/0431/7790/2241/files/255119044.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2099/files/99311177981.pdf
    • https://cdn.shopify.com/s/files/1/0465/5031/9262/files/pilaluworifesinurovim.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/88746442880.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7223/files/sony_rx100_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/5756/0217/files/academic_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0431/4729/6922/files/mowozaloza.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/gopaxekomivijopo.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_off0000692c.bin
7d36d8af4d2f1bb33ce44a855b7e94535c6b8f162f2e339be3092b9e45f8b2ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x692C 5288 bytes
font_01_sfnt_off00007b36.bin
e42460ce6bee0b901382d160157290a6a5a24562076470ba58b7f878f592feb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B36 10388 bytes