Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9fa7dcc1b3bc3cc…

MALICIOUS

PDF

45.5 KB Created: 2020-10-26 11:26:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29037c1b4201ed2edfc91e739681f9d6 SHA-1: 7f920c9fbe8f338b5bb79effcfaa7d1baffce982 SHA-256: b9fa7dcc1b3bc3cc4d91ee89eaa0abf0640e65e249e32d92a96916c0007793bd
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL, https://gettraff.ru/123?keyword=feira+de+mangaio+partitura+violino+pdf, is flagged as a known malicious redirector. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to lure users to malicious sites, potentially for phishing or malware distribution.

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://gettraff.ru/123?keyword=feira+de+mangaio+partitura+violino+pdf
    • https://cdn-cms.f-static.net/uploads/4370078/normal_5f90bc0676e69.pdf
    • https://cdn-cms.f-static.net/uploads/4403260/normal_5f961c1039997.pdf
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f8707afb2b95.pdf
    • https://cdn-cms.f-static.net/uploads/4380210/normal_5f8f2733c60f1.pdf
    • https://cdn-cms.f-static.net/uploads/4393900/normal_5f952c1ce7e01.pdf
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/6454644.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/fuvogejub.pdf
    • https://zalawevovupat.weebly.com/uploads/1/3/0/9/130969727/tusutinekos.pdf
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/1418157.pdf
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/8f24ebaa3f201f6.pdf
    • https://cdn-cms.f-static.net/uploads/4408009/normal_5f920a6856433.pdf
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f95f5f6c3476.pdf
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f92c16a31139.pdf
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f95236b8b2bb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/belt_conveyor_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1254/files/the_meursault_investigation_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0486/1132/8160/files/apa_quiz_answers.pdf
    • https://cdn.shopify.com/s/files/1/0266/9376/3251/files/pokemon_ash_gray_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0501/6679/2357/files/38386477322.pdf
    • https://cdn.shopify.com/s/files/1/0497/5276/8666/files/kotlin_for_android_and_ios.pdf
    • https://cdn.shopify.com/s/files/1/0494/9160/7711/files/37938177349.pdf
    • https://uploads.strikinglycdn.com/files/aa852298-6396-4aea-8ce9-7215327b884e/quimica_de_los_alimentos_badui_4ta_edicion.pdf
    • https://uploads.strikinglycdn.com/files/bc669e18-a3da-4564-af1a-cbe1f2921f50/hopa_gamgastar_indir.pdf
    • https://uploads.strikinglycdn.com/files/d2ef0f7e-0712-4efc-b780-1e4032e90a8b/25281335512.pdf
    • https://uploads.strikinglycdn.com/files/fa5f4ce4-3b12-43ff-ae3f-1cc917951909/50349348017.pdf
    • https://uploads.strikinglycdn.com/files/0571c3d2-10c9-4323-bb59-e6bc1f599e60/basizasolujejil.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_off00006f7e.bin
0455032413a530f99d92891514c0f67153df6746b5a09d4b11464bdd3ee8e3b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7E 5196 bytes
font_01_sfnt_off00008123.bin
c53b4e2be6e4d30cf7e11379c8b01b6ebb766aacbfaea88cc1a5d0538351d8bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8123 12484 bytes

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