Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e47ca0839fbdcb…

MALICIOUS

PDF

39.3 KB Created: 2020-08-14 20:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9c919b7e14783913df43c10855670ce SHA-1: f42b0d8389c98f54d44e055735e3edae9e3ab34c SHA-256: 54e47ca0839fbdcbc9ac89276fbda5aeb18fce9567382845d4deb2bb16833d8f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector. The document body itself is heavily obfuscated but contains a URL that is also present in the heuristics. The presence of a large link farm suggests an attempt to manipulate search engine results or distribute further malicious content.

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.com/pify?keyword=bahubali+1+cinema+songs++naa+songs
    • http://pozexoku.musclecarsandclassiccruisers.com.au/uploads/1/3/0/9/130969204/pifugavo_buronez_risit.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/rarebodanapagumobefubeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/8698/6908/files/poroziweguzawofevavin.pdf
    • https://cdn.shopify.com/s/files/1/0429/5101/6614/files/80323260022.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6680/files/waranusiverumadewo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/44277131808.pdf
    • https://cdn.shopify.com/s/files/1/0436/4373/2126/files/8528184982.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/perry_chemical_engineering_handbook_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/5431/6197/files/99598842760.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/dipegeduralabuge.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9829/files/wexofabekofozoxexesiro.pdf
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/6664089205.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_off000056ab.bin
c867df2e0082c069f0fe6d7ee01d849b9056acc0013ba56a8b2d41864fffd57f
pdf-font-stream PDF embedded font (sfnt) at offset 0x56AB 5356 bytes
font_01_sfnt_off000068ba.bin
75f28baabdf1e0ff22a069e7664235d247bedeeffc90caca312c4026e51f12b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x68BA 12612 bytes