Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15adab40dc7064e…

MALICIOUS

PDF

39.5 KB Created: 2020-08-26 00:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3192cd5a7234a0ed2dd2ea8d8c9bf901 SHA-1: 932a35045997de69c219e056af2175e3d74c821c SHA-256: d15adab40dc7064ef8d2cb068e8a22d50ef51ac75703f483b7c915aa9e7592bc
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of a link farm suggests an attempt to distribute malicious content or phish users. The document body itself is heavily obfuscated and contains the primary malicious URL.

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=internet+programc%25C4%25B1l%25C4%25B1%25C4%259F%25C4%25B1+megep
    • http://files.newartbycjepps.com/uploads/1/3/0/7/130739764/wesod.pdf
    • http://files.colortrendzsalon.com/uploads/1/3/0/7/130740257/4543987.pdf
    • http://vekekeko.glennwoodhillsretreat.com/uploads/1/3/1/3/131382486/4996930.pdf
    • http://files.runbikechaleur.ca/uploads/1/3/1/6/131636957/pakikeno_kasut_kewikawabonivun.pdf
    • https://cdn.shopify.com/s/files/1/0428/0867/2423/files/46277053718.pdf
    • https://cdn.shopify.com/s/files/1/0429/9007/6057/files/fakegifabubudilinol.pdf
    • https://cdn.shopify.com/s/files/1/0436/0513/1421/files/21318928053.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/academic_word_list_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2969/9482/files/foburejuwo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/cedula_de_identificacion_fiscal_formato.pdf
    • https://cdn.shopify.com/s/files/1/0431/5771/7152/files/19084209299.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7641/files/21926018711.pdf
    • https://cdn.shopify.com/s/files/1/0437/2925/6602/files/bratstvo_crnog_bodea_3.pdf
    • https://cdn.shopify.com/s/files/1/0435/6905/3854/files/18084778214.pdf
    • https://cdn.shopify.com/s/files/1/0445/2355/2927/files/aircraft_fuel_system_design.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2866/files/bcd_addition.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_off00005994.bin
20fc37f577cc96df4e89500e326bd8c67f42370476e3f05261227f42f1fa3ba1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5994 5272 bytes
font_01_sfnt_off00006af1.bin
b51c6374923a09525a331f1fada64c8f423499db9c9060c7f785c25b5b69a634
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF1 11636 bytes