Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd8d903f446dbe16…

MALICIOUS

PDF

44.4 KB Created: 2020-08-15 00:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f351d0e2bfd06f3acbfe5cc16eef7fa SHA-1: 339b7d5bde522f92e3d15d220250129174f19ccf SHA-256: cd8d903f446dbe161edfbe5262b578a3373538fbfeb5adb46ca60a82537afdeb
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous external links. The primary malicious URL identified is https://ttraff.com/pify?keyword=dls+hack+profile.+dat+18, which is likely used to funnel victims to further malicious content. The document body contains obfuscated text and URLs, reinforcing the malicious intent.

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=dls+hack+profile.+dat+18
    • http://files.seasparishlo.org/uploads/1/3/1/3/131383657/podowogudov_muwited_gafopamajovuxip_tuporupebirapuj.pdf
    • http://files.expeditiondrenched.org/uploads/1/3/1/8/131871739/jodisaviropebifu.pdf
    • http://files.localsardinia.com/uploads/1/3/1/0/131070476/lerus_kajab_gowojedurod.pdf
    • http://files.briahfashions.com/uploads/1/3/0/7/130739443/wekaxiza-luviwapira-sosuba-saloxosi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15900382268.pdf
    • https://cdn.shopify.com/s/files/1/0432/3246/0960/files/30990588867.pdf
    • https://cdn.shopify.com/s/files/1/0432/6912/8354/files/xenaxugi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3594/1285/files/junolalukelufapubarerur.pdf
    • https://cdn.shopify.com/s/files/1/0428/8262/9798/files/dasar_dasar_akuntansi_jilid_1_al._haryono_jusup.pdf
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/archenemies_marissa_meyer_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0451/7065/5381/files/57740686398.pdf
    • https://cdn.shopify.com/s/files/1/0447/7665/2949/files/volkswagen_vanagon_official_factory_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0444/4664/6439/files/off_road_bus_games.pdf
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/baazigar_film_song_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3481/files/25380972628.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/8319316747.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/13805140142.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_off00006d08.bin
96fe7b4ad2e324180e8072345a9d91993a2214b0f8e41093884589d6faa59a69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D08 5584 bytes
font_01_sfnt_off00008003.bin
3021b9b1f7b71325f4ff6c16165a31c04c1525e0f8a1bfd8db5e926a0ca149aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8003 10872 bytes

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