Malicious PDF — malware analysis report

Static analysis result for SHA-256 4342d9cfdabee567…

MALICIOUS

PDF

89.6 KB Created: 2020-08-05 16:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0fe2c315483367e990b1116e31ebb68 SHA-1: c018794c5c4549d1343dee96d052f71de8e50ac1 SHA-256: 4342d9cfdabee56772ccf314a051f862540616f476ff31e123b671f5ac8ab8be
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=ayurvedic+plants+information+in+english+pdf`. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to trick the user into visiting this malicious site. 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=ayurvedic+plants+information+in+english+pdf
    • http://files.imaginethekey.com/uploads/1/3/2/6/132682802/xifixazizumi_xagafor_vawemeparo.pdf
    • http://files.fancyimageyarn.com/uploads/1/3/0/8/130814601/rodilo.pdf
    • http://files.fhendodontics.com/uploads/1/3/0/7/130774990/5815.pdf
    • http://files.speakingofveganfood.com/uploads/1/3/1/3/131398605/4204795.pdf
    • http://files.intrepidresearch.org/uploads/1/3/0/9/130969148/3683675.pdf
    • https://cdn.shopify.com/s/files/1/0441/0982/4152/files/99340435380.pdf
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/wowokaxuputizutapojelatof.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/associer_plusieurs.pdf
    • https://cdn.shopify.com/s/files/1/0429/8955/1770/files/75771736506.pdf
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/88065788986.pdf
    • https://cdn.shopify.com/s/files/1/0431/5434/2042/files/windows_10_game_bar.pdf
    • https://cdn.shopify.com/s/files/1/0435/2281/8200/files/dinanapozamitawive.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8913/files/metubewasipaze.pdf
    • https://cdn.shopify.com/s/files/1/0437/3820/2273/files/fulimovidixazutefefu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9550/6592/files/58209727562.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8241/files/applied_physics_1st_year_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/sesinukepepovafivam.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/vocabulaire_des_animaux_en_franais.pdf
    • https://cdn.shopify.com/s/files/1/0435/4090/6135/files/python_convert_list_to_string.pdf
    • https://cdn.shopify.com/s/files/1/0431/0676/2903/files/mesh_to_micron_chart.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_off00011fdf.bin
752c0319c9e958a401d4e3ff5e8ea0e660a327dcd00fea4d3bac347433e0b2ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDF 5720 bytes
font_01_sfnt_off00013341.bin
f8b5f20e54df9542878464455bcef3f0411f027fb500fb27b0e8065ce0041ac8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13341 10976 bytes

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