Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b69bda56ec1aae…

MALICIOUS

PDF

43.6 KB Created: 2020-08-17 16:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4db56665211fc84278524e3878da04a SHA-1: 27d2590141986f1cb0b0d5d8ee1d424a59852bed SHA-256: 27b69bda56ec1aae385bd88fde290184bd8e3a7952af6712b7b75a6770b5d465
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Arcgis 9.3 software free with crack', indicating a lure for illegal software downloads. The presence of a mass external PDF link farm further supports the malicious intent of distributing links to potentially harmful content.

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=arcgis+9.+3+software+free++with+crack
    • http://famelilu.earthlyhomes.com/uploads/1/3/0/7/130738696/389124.pdf
    • http://files.abundantlivingbytyrolea.com/uploads/1/3/1/3/131398504/pajezitikatezij.pdf
    • http://files.cowboyarmory.com/uploads/1/3/0/9/130969981/5e3169.pdf
    • http://files.lovelifeagain-lifecoachingmore.com/uploads/1/3/2/6/132695416/2524687.pdf
    • http://files.nworldweiqi.com/uploads/1/3/2/6/132683088/vubifazuzixo_womerefiv.pdf
    • http://find24hs.com/cinema
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/sagasudevit.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1638/files/nowinadugokabe.pdf
    • https://cdn.shopify.com/s/files/1/0436/1817/3086/files/bible_lesson_on_faith.pdf
    • https://cdn.shopify.com/s/files/1/0429/5032/8486/files/fupipesusidedajemexaronup.pdf
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/25182533196.pdf
    • https://cdn.shopify.com/s/files/1/0434/3008/4760/files/blacksmith_guide_ff14.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/95576622877.pdf
    • https://cdn.shopify.com/s/files/1/0432/2885/6477/files/difatusulusewivadaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/meeting_minutes_template_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0450/4734/9406/files/millennium_development_goals_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/2851/9832/files/microbiology_lab_report_answers.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_off00005b9c.bin
0b6db0038fec2c553c560028c56c2e0d1fe863a29b6c0e945e1e32f6865769a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9C 5608 bytes
font_01_sfnt_off00006eb4.bin
5250c79f07f89ee31b63782c3c3ab6aad70ff09d4ed6b704bd0023d83a5da76a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB4 15832 bytes