Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa55d92bdde5018…

MALICIOUS

PDF

39.4 KB Created: 2020-08-17 05:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5d33f98ee679b62f24ab7d12cf91494 SHA-1: 68f34b0684f2d2d81bef54970e5c6a60369d3e08 SHA-256: 4aa55d92bdde50181ddbd85657650a40e199070ace41d04b9cc55e5ca0196896
152 Risk Score

Malware Insights

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

The PDF contains embedded URLs that lead to a malicious redirector, disguised as a link to "shopdog sawhorse plans pdf". The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the primary redirector URL. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same lure text and URLs.

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/pify?keyword=shopdog+sawhorse+plans+pdf
    • http://files.shcsublimation.com/uploads/1/3/1/0/131071041/0b3a4.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9292/files/40123625096.pdf
    • https://cdn.shopify.com/s/files/1/0435/8189/8913/files/wobusavowib.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1791/files/refufib.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/gamojuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/divuxugavemepiki.pdf
    • https://cdn.shopify.com/s/files/1/0448/3730/6529/files/mercedes_benz_comand_system_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/zixatogeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/1330/7541/files/budewujobivepezudowawuboj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/92251721822.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/penazugaxivitamakefowef.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_off00005ae2.bin
2d855b336f26875522bc886cac7d1dcc317a8f510591f1dc88540aeb5b21813f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE2 5500 bytes
font_01_sfnt_off00006da2.bin
64b935b0f80aa34b7b1388f5a64778e56956373db47f90ca8e1ee0dce064623d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA2 10376 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.