Malicious PDF — malware analysis report

Static analysis result for SHA-256 7840dd0ee5ba6cf8…

MALICIOUS

PDF

37.2 KB Created: 2020-08-13 10:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30c3cb262ee0cafae550dd67a7c0cdad SHA-1: d76c669542f6a6a4aecd022ed41e730dba70ce20 SHA-256: 7840dd0ee5ba6cf854757be78d56b45b25012dca2c54fe62b1580c68f5d4c83e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many of which point to Shopify-hosted PDF files, suggesting a link farm for SEO manipulation or to obscure malicious destinations. One critical heuristic identified a link to known malicious redirector infrastructure, specifically `https://ttraff.cc/wb?keyword=ramadan%20moon%20book%20pdf`, indicating an attempt to redirect users to harmful content. The ML classifier strongly flagged this PDF as malicious, supporting the presence of 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/wb?keyword=ramadan%20moon%20book%20pdf
    • http://files.hand2ear.net/uploads/1/3/0/7/130739154/femiwizoxexema.pdf
    • http://files.goldentreasureconsulting.co.uk/uploads/1/3/2/7/132740275/mizekoxobegipa.pdf
    • http://files.jointeducationteam.org/uploads/1/3/0/8/130813606/rudize.pdf
    • http://files.shamblinstone.com/uploads/1/3/1/3/131381976/50002.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nawujumukupuzuwoxelojoses.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/how_to_screen_share_discord.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5734/files/pearson_biology_miller_and_levine.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/35880168988.pdf
    • https://cdn.shopify.com/s/files/1/0439/1187/2667/files/brazilian_portuguese_grammar_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/botezosural.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/97160098554.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/fanuc_cnc_programming.pdf
    • https://cdn.shopify.com/s/files/1/0435/5748/6753/files/nut_bolt_weight_chart.pdf
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/titagi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2354/9094/files/39834099379.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053cf.bin
704d3166315faa6442a7b09085922fb4c0433a26774846a5d0deb7deffe26581		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53CF 5092 bytes
font_01_sfnt_off0000651b.bin
d76bc85898520f43a3a692b3e70ab5776aa9f4b1930b6f3289b266995c426ad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651B 10352 bytes

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