Malicious PDF — malware analysis report

Static analysis result for SHA-256 062edfe6a816d246…

MALICIOUS

PDF

46.4 KB Created: 2020-08-14 23:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02b0f5a7080d8864df5bfdd0028b5d99 SHA-1: b193b5c95bc24ce37a45ddd3ed284bb258729950 SHA-256: 062edfe6a816d246764384ea47922367a706b5e19086580b37a7e4cd0970c2d0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic generation. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/wb?keyword=kolik%20pada%20bayi%20pdf', indicating a malicious intent to redirect users. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=kolik%20pada%20bayi%20pdf
    • http://files.wekapo.net/uploads/1/3/1/8/131871605/juvinopukamoti-devivuvaz-sofirox-tunanupikirir.pdf
    • http://files.ryankitley.com/uploads/1/3/2/6/132695663/9672795.pdf
    • http://filozowen.jennifersellettiphotography.net/uploads/1/3/1/4/131482975/7968266.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/1444/5465/files/tame_impala_elephant_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/nomeboxamejuzuvoxilinu.pdf
    • https://cdn.shopify.com/s/files/1/0448/2508/4065/files/trane_xl824_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2048/3751/files/zobanevelabiki.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/nuluvose.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/zatunimamapogawoguvexujud.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0081/files/33202120752.pdf
    • https://cdn.shopify.com/s/files/1/0449/3810/0891/files/90988254013.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/14997121635.pdf
    • https://cdn.shopify.com/s/files/1/0433/5557/0341/files/wezow.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/54814974644.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d5c.bin
0d9ffb44bd715072cc2203cfab953408208725d3399dfbde6ef726a3f75ada6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5C 4520 bytes
font_01_sfnt_off00007cb7.bin
3bff6b5defc197f5422a6f621970d11389a7b92878950c2c0bc7784740566445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB7 10284 bytes
font_02_sfnt_off00009f24.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F24 4324 bytes

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