Malicious PDF — malware analysis report

Static analysis result for SHA-256 1115867ba854ac58…

MALICIOUS

PDF

44.7 KB Created: 2020-08-23 13:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb49873c747cafee4253a2cfc1b0d768 SHA-1: 01c4e4a9bd59ca227d2265bf2d9dcac0c5ed48ff SHA-256: 1115867ba854ac5857436449951edd3ca2f1eb90b145d88aa0f1f8877190dddb
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 external resources, suggesting a link farm or SEO manipulation tactic. One prominent link, 'https://ttraff.ru/pify?keyword=bootcamp+for+macbook+air+2017', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, indicating a lure to external content. 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/pify?keyword=bootcamp+for+macbook+air+2017
    • http://files.campkeola.org/uploads/1/3/1/3/131384663/vonijelituvol_sisiluz_rirapuxitum.pdf
    • http://files.ceramikhausofcebu.net/uploads/1/3/0/8/130814676/faseje.pdf
    • http://files.centroseq.com/uploads/1/3/0/7/130739926/5316698.pdf
    • http://lazizete.midcitycarriages.org/uploads/1/3/2/8/132814975/7111690.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/principles_of_biostatistics_pagano.pdf
    • https://cdn.shopify.com/s/files/1/0437/6127/0935/files/african_animals_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/shinee_ring_ding_dong_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/6789/1094/files/vexogiwababosesusi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7108/files/vewijanawu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1728/0408/files/59000467812.pdf
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/49869395547.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/dutimeke.pdf
    • https://cdn.shopify.com/s/files/1/0437/4737/7301/files/graphic_design_book_in_bangla.pdf
    • https://cdn.shopify.com/s/files/1/0436/9317/9030/files/nsw_traffic_accident_report.pdf
    • https://cdn.shopify.com/s/files/1/0447/6711/7463/files/barron_s_ielts_strategies_and_tips_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/59013979023.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/mixajaxajetaxugaxabaker.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_off00006322.bin
d17fbef9410fc581c8aaa0bfa7891a85b0c14df92bbcb12d1210e5ccc3d833dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6322 5176 bytes
font_01_sfnt_off000074c2.bin
63d9dae62547ec5ab05a9ab92f6c8be6a300fdc22bdfe5c06157aae0679be042		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C2 10292 bytes
font_02_sfnt_off0000978e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x978E 4324 bytes

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