Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b726c26dddf938…

MALICIOUS

PDF

54.5 KB Created: 2020-08-30 07:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea22a360169155b0f072518e34458e4a SHA-1: 7f40a3827174334a3fd98bfef45656eb713ad53c SHA-256: 19b726c26dddf93899efd206aec374974951959d226e84b7f1fb8b41d1440c23
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.me', suggesting a phishing or malware distribution attempt. The document body, though garbled, contains the same lure text and URLs, indicating the file's purpose is to direct users to malicious infrastructure. No scripts were extracted, but the presence of embedded URLs and the ML classification strongly indicate 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.me/wix?keyword=skyrim+complete+alchemy+and+cooking+overhaul+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_82d58ea8d7b746d8b83657b1ec4f3a29.pdf
    • https://static.usrfiles.com/ugd/07625c_91211ea1c87c43a19ecd7f7f566d57d8.pdf
    • https://static.usrfiles.com/ugd/4725f1_d5ab61435ca24973a4dc6ebf50197c0d.pdf
    • https://static.usrfiles.com/ugd/96768c_b4817ccab79946c08a603df4ae6e5254.pdf
    • https://static.usrfiles.com/ugd/d4a9d6_e22d99992bc540d0ab4e388c57dc5cd2.pdf
    • https://cdn.shopify.com/s/files/1/0431/6305/8340/files/accounting_principles_11th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/3000/files/definition_of_balance_score_card.pdf
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/nokasibona.pdf
    • https://cdn.shopify.com/s/files/1/0432/9573/5976/files/avantage_comparatif_dfinition.pdf
    • https://static.usrfiles.com/ugd/599f1c_a443c5f1ec554f28a0da69ad313131d8.pdf
    • https://static.usrfiles.com/ugd/b4609a_666c551e1d944282adb9bdf2828dfb90.pdf
    • https://static.usrfiles.com/ugd/784815_925dfd76e38146aca86e406fdfb470c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc2ca64bcc87477fb5d65930b045d250.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ae88f32c82d4561a969baeaeb101fa2.pdf
    • https://cdn.shopify.com/s/files/1/0428/5884/0223/files/hong_kong_airport_terminal_1_map.pdf
    • https://cdn.shopify.com/s/files/1/0435/8032/6051/files/suzobewijubidesanadisiv.pdf
    • https://cdn.shopify.com/s/files/1/0436/5156/3670/files/civ_5_civilization_guide.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_off0000895a.bin
647b4830e7c777d15bd113737b0a6032b9c26c2a08ef4c85b9187bcbb25ce48c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x895A 5640 bytes
font_01_sfnt_off00009c6d.bin
6ce60a828ccb79bd4ef4aa70fc6c1306a90c008f05c2184a7adb6f125b880576		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C6D 15592 bytes

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