Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62588289deefc9c…

MALICIOUS

PDF

57.4 KB Created: 2020-08-12 14:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f80f7020b41ab342e78b501f425eb2e SHA-1: 3217105da05360f3059064c5b938a82b23e71382 SHA-256: d62588289deefc9ce1a1c01878438e338e15c7c7396635b489104bca2a942719
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to embedded links pointing to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=livre+l+attrape+coeur+pdf. The document body contains obfuscated text and a URL, suggesting an attempt to disguise the malicious intent. The ML classifier also strongly indicated maliciousness.

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=livre+l+attrape+coeur+pdf
    • http://files.lcmupc.com/uploads/1/3/1/4/131483235/megegojusoxog.pdf
    • http://files.sycamoreucc.net/uploads/1/3/1/3/131398006/zesati-dewusipirejot-fuxemi-rogulizakiw.pdf
    • http://files.alleghenybuilders.com/uploads/1/3/0/7/130739369/a18ff19b1463.pdf
    • http://buvex.writerswithroomtobloom.com/uploads/1/3/1/0/131070356/dupekigixo.pdf
    • https://cdn.shopify.co
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/bihar_si_previous_year_question_paper_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/7741/0724/files/xokofuje.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/kawumitiwexal.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/banker_s_algorithm_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2436/files/windows_10_scheduled_restart.pdf
    • https://cdn.shopify.com/s/files/1/0436/6408/1046/files/30912425745.pdf
    • https://cdn.shopify.com/s/files/1/0433/6372/9557/files/geriremawifepuraraze.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/mesatulolevoje.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/9312758652.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/boccherini_minuet_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0439/3969/2699/files/wugipobasokesoguv.pdf
    • https://cdn.shopify.com/s/files/1/0434/5305/5128/files/feelings_and_emotions_speaking_activities.pdf
    • https://cdn.shopify.com/s/files/1/0434/1989/3927/files/xasiw.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_off0000a4c8.bin
65250735ce8971580e094b448da2be283d22544182318b85bd3ea3780c674d56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4C8 4972 bytes
font_01_sfnt_off0000b5c4.bin
48cfb3cc7684ec52ae13baf4eff15a2f2cf45c584778611e90b89a392733cf7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C4 10264 bytes

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