Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a0b48ec794e7e6…

MALICIOUS

PDF

44.6 KB Created: 2020-11-02 06:36:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: c91facdd6802e8deeda649a35171a210 SHA-1: 4563fb98889d794208aafdc48fdfdabffca34349 SHA-256: 98a0b48ec794e7e6b3994f8c2ac83e6e28523b649d5dad7e9a0ac808a1b5da09
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.me/123?keyword=murder+mystery+2+codes+2019+july+not+expired In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417221/normal_5f9cdc919d1b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387050/normal_5f90f891950f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f8a6371a5306.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9358/0704/files/vugivenik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2595/5497/files/93293679893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8209/6033/files/gewezuxun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0246/8784/files/50672805396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4617/2310/files/exorsus_raid_tools_visual_note.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a58db70-5ea2-4e0d-a724-d8ed22a5b1e6/36081238346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b8148be-b92e-4a58-9202-7afac4e4d587/xirabufiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1085/0467/files/32623717797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/pagezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7451/9191/files/43689296875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2844/8933/files/sparkfun_inventors_kit_guidebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6125/4575/files/lohnsteuertabelle_2020_monatlich_bayern.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7010/9890/files/37096638222.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000614e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x614E 5624 bytes
SHA-256: 27de4decb09618c93097df66bb819b60a36db90ac44a00bf55487d5c8b392f9c
font_01_sfnt_off00007475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7475 10172 bytes
SHA-256: f57b21c0de74bd4882740e80393bb22c4c69f85b8bae1eac372a432854362dbb
font_02_sfnt_off00009754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9754 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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