Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce2ee8706a888bc…

MALICIOUS

PDF

79.2 KB Created: 2020-09-22 09:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b336cbbcc4928dbeb64c2d04edbe03dc SHA-1: 2eecabdbdd37405aa959c2dd76f96cabeefdb44c SHA-256: 1ce2ee8706a888bc461ff9b4897ce65caa7663f2e737268069d31f82a49991b6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a reference to the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=warframe+ash+systems+price In 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://37157333-bd33-4b8a-9ce7-87f01b44b65f.filesusr.com/ugd/805d2a_04726287e304437d8bc5af2aec74b94b.pdf?index=trueIn PDF document text
    • https://a21525ec-a914-459d-86c2-fc1d4f07722b.filesusr.com/ugd/6116da_f1a2f3fda8a142138120976c4f5c6dfe.pdf?index=trueIn PDF document text
    • https://5b1b9d8c-bd64-4cb0-9124-fdf7e9454b8c.filesusr.com/ugd/49488e_7333413d3231402ca35d56b67cfa75e1.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5900/9943/files/puwurab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6340/8795/files/meet_in_spanish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5797/0328/files/galvanised_mesh_sheet_sizes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/3764/0092/files/govitezemevom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4551/0568/files/43331691568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/2555/6643/files/bitdefender_mac_trial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/rpg_sprite_maker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/zunupoxikeligoxifasadenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/2109/9162/files/chal_chaiya_chaiya_song.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC47D 4908 bytes
SHA-256: a03fa33c294e5454ab8a6a6198be9e9390aeea495c0ed3fcdc2698aaa7a8a361
font_01_sfnt_off0000d537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD537 2320 bytes
SHA-256: a9589956b1974b487a720d346bd8f4419cd09a5b45b33ddd4d24a30e3a9c808a
font_02_sfnt_off0000df86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF86 13464 bytes
SHA-256: bbde418f8d407af7fc2130e7c53a0366d20769986e99e764a753125ee422e84c
font_03_sfnt_off00010afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFA 16036 bytes
SHA-256: bc1c1644e30597ae0beaac312b9749a82b64e26c109397326cdc67fdbaf2fe17
font_04_sfnt_off00011f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F61 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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