Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e6b855021f93c6…

MALICIOUS

PDF

43.4 KB Created: 2020-08-07 02:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bad6df100c2ef4cb68328cdb8a69371 SHA-1: 4e01e88920a6133a57ed8d564ac02e4afafc19b6 SHA-256: 87e6b855021f93c69dbc25dcb78ad9acce4b0c701269f0c89c55ab4dc91c55b2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=edit+pdf+online+free+with+same+font', which is presented in a way that suggests a lure for online PDF editing. The document body, though heavily obfuscated, also contains this URL and other Shopify links, some of which are benign. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to 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=edit+pdf+online+free+with+same+font
    • http://files.restoringhopeliberia.org/uploads/1/3/0/9/130969746/245231.pdf
    • http://files.gleisinc.com/uploads/1/3/1/6/131637482/jenoda.pdf
    • http://files.chosenchow.com/uploads/1/3/1/6/131637881/bijakaxizitivowewi.pdf
    • http://files.100crystalametz.com/uploads/1/3/1/8/131860378/wijuxukagado.pdf
    • http://files.atlcasestudies.com/uploads/1/3/1/1/131164462/nabexodelilim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74133662670.pdf
    • https://cdn.shopify.com/s/files/1/0450/8853/8776/files/christmas_songs_choir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupesuditijativerawepafu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9387/6118/files/15930988539.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9160/files/79447688699.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1718/files/45673269952.pdf
    • https://cdn.shopify.com/s/files/1/0431/0764/7639/files/cisco_aironet_1815i.pdf
    • https://cdn.shopify.com/s/files/1/0433/8106/3838/files/97954843101.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/athens_travel_map.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8456/files/empirical_approach.pdf
    • https://cdn.shopify.com/s/files/1/0438/8893/5067/files/26404717687.pdf
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/hemostasis_screening_test_pdf.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_off00006aa9.bin
11b3ece91fcf7c1e56a07da529e9c7a105e966c1e18ae72258a445aa2fa86f72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA9 5332 bytes
font_01_sfnt_off00007cb4.bin
6854fa12fb3a6f326fed008ec220cf5c1b7721cc20d7c14653f7bf9a0f9f802f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB4 10352 bytes

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