Malicious PDF — malware analysis report

Static analysis result for SHA-256 020a53d40343d0db…

MALICIOUS

PDF

42.8 KB Created: 2020-08-29 10:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c2d9aeafc51f9763e7d8220ad37a8c7 SHA-1: 37b7fe62c1752036afb4d8cbd13ba5d5f887149f SHA-256: 020a53d40343d0db237f59953be0d28ae019491b6b2c032f7501d5cbe7f3a068
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, including a critical link to a known malicious redirector at 'https://ttraff.cc/wix?keyword=how+to+highlight+in+pdf+file'. The document body and heuristics indicate a link farm strategy, likely intended to direct users to malicious content or phishing sites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a 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.cc/wix?keyword=how+to+highlight+in+pdf+file
    • http://s/s----th---------------------of-the-game
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/4625/6295/files/sight_word_puzzle_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41267837863.pdf
    • https://cdn.shopify.com/s/files/1/0430/3041/3475/files/37552789534.pdf
    • https://cdn.shopify.com/s/files/1/0433/9793/9361/files/dujijawejezit.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6250/files/bible_apologetics.pdf
    • https://cdn.shopify.com/s/files/1/0431/8507/8434/files/abcd_movie_all_song_pagal_world._com.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/bones_episode_guide_season_10.pdf
    • https://cdn.shopify.com/s/files/1/0435/8651/9197/files/autocad_2010_64_bit_crack_only.pdf
    • https://cdn.shopify.com/s/files/1/0438/5275/9200/files/mifanujo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/ge_dryer_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9434/3841/files/17424194673.pdf
    • https://cdn.shopify.com/s/files/1/0438/1281/5008/files/bahishti_zewar_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0843/files/kepakurafivifetewelunemo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.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_off00005cff.bin
b6373bb6b7994b3c69281f426443335421806735c8cd582afa1a3c2f0072719e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFF 4660 bytes
font_01_sfnt_off00006ce6.bin
0dbe1b0670751621b2064b11f2ef50db95b5d7344163c2fd40dc3758e1a8eced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE6 10316 bytes
font_02_sfnt_off0000903a.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x903A 4324 bytes

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