Malicious PDF — malware analysis report

Static analysis result for SHA-256 4156fee6a6abe0cd…

MALICIOUS

PDF

47.9 KB Created: 2020-08-08 06:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d72f7af9ebde90394655cf603f80925b SHA-1: 5a5fb4cae6f5d83aeae79a213df6ac8d11577186 SHA-256: 4156fee6a6abe0cda9faa0c8bcda0b8e8e287abbb9ddf192a0577b68b6682dd6
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a Dremel saw manual and the malicious URL, suggesting a lure. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload.

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=dremel+saw+max+manual+pdf
    • http://sigobigu.406cavoodles.com/uploads/1/3/1/3/131380005/9765589.pdf
    • http://files.riverwoodwinery.com/uploads/1/3/1/1/131164157/vekexoniv.pdf
    • http://files.catalinacastells.com/uploads/1/3/0/7/130775180/3b7439dfea.pdf
    • http://files.ugaswimanddiveclub.com/uploads/1/3/2/7/132740462/bexuwexibarep-balozevolas-mivovimodafo-gulanu.pdf
    • http://files.mariagoundry.com/uploads/1/3/1/3/131382395/gawalotera_rigagakivefeka_rupodopososu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58933331969.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nazowexoratusitufunu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/gipozaposuviveselovif.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4012/files/american_english_file_3_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/29122304847.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/59195513014.pdf
    • https://cdn.shopify.com/s/files/1/0438/8500/2920/files/64781493134.pdf
    • https://cdn.shopify.com/s/files/1/0435/2815/9381/files/gemagutanalajimuwi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6859/7158/files/21667381981.pdf
    • https://cdn.shopify.com/s/files/1/0429/3735/2358/files/kerivulaxunobodezukibe.pdf
    • https://cdn.shopify.com/s/files/1/0438/2959/2214/files/basic_construction_materials_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/9072/9377/files/zufukoredibana.pdf
    • https://cdn.shopify.com/s/files/1/0432/3672/0808/files/bupaxepikuramesabop.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_off000071a1.bin
85336f6bc779ad8bf5aebe13f30264b4a6ea06dd817ce2bb0b4255a0c0c602a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A1 4992 bytes
font_01_sfnt_off00008288.bin
9e8df8ecd7528035248400b2544a519e327056f5bed47242d588c9d528a5febb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8288 9920 bytes
font_02_sfnt_off0000a46e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA46E 4324 bytes

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