Malicious PDF — malware analysis report

Static analysis result for SHA-256 05cc217992b7a665…

MALICIOUS

PDF

45.5 KB Created: 2020-08-02 13:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fd92e8ae7b022b4c34273d0efd883bc SHA-1: 80a2af8557f2d2b7dae2915eb80e6fdac9a3ccde SHA-256: 05cc217992b7a6652d1357dae9b37d6bff6eef808f74b631b62572cb52227e6a
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, masquerading as a link farm for various topics. One of the primary links, 'https://ttraff.ru/pify?keyword=fallout+4+tag+for+search', is identified as a known malicious redirector. The document's structure and the presence of these links suggest an attempt to direct users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

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/pify?keyword=fallout+4+tag+for+search
    • http://files.undeniabull.net/uploads/1/3/1/6/131637055/rezogexed-pelopusitu-baxug-vejenugedozaw.pdf
    • http://files.velohangar.com/uploads/1/3/1/8/131871633/dikelajukatan_migije_rokoxonob_jawotadenatise.pdf
    • http://files.wisefeline.com/uploads/1/3/1/3/131380741/wuvoxe.pdf
    • http://tosumi.christhamilton.org/uploads/1/3/0/8/130815017/tazuvafixelufudalul.pdf
    • http://files.radyrandmorganstown.org/uploads/1/3/1/8/131856108/samojojagumebizo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/bafakaluvapa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/69199756923.pdf
    • https://cdn.shopify.com/s/files/1/0447/3192/4629/files/ffxiv_act_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/balevogigadan.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/pafemod.pdf
    • https://cdn.shopify.com/s/files/1/0433/7244/5854/files/78129006867.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/40679420569.pdf
    • https://cdn.shopify.com/s/files/1/0432/2725/0850/files/dikedafizim.pdf
    • https://cdn.shopify.com/s/files/1/0434/1111/2092/files/fafulodupebopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5060/6497/files/63099886437.pdf
    • https://cdn.shopify.com/s/files/1/0433/7991/6967/files/june_2017_geometry_regents_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/fuvitixamelirizu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7298/7046/files/nunerizakotekitopodenuzu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007483.bin
f4385d38b89429badd5f75a9dc56c268e4092cd0d0f24b911182edc2f35f26d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7483 5184 bytes
font_01_sfnt_off00008630.bin
5f347a94d443eb1a27f03cafa68e43e51ca5bd0179bcf0c18c0e077173c4e23c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8630 10060 bytes

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