Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42125e36d60096f…

MALICIOUS

PDF

63.9 KB Created: 2020-08-14 02:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeb3a00c243e3d84482b384451049174 SHA-1: ec63136e1dde8fc0ccfd261fe3ff434520e477cd SHA-256: f42125e36d60096f3e420615fcee09c537c0fd18ecbfae045192c4bf3dcbe981
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Gwent' and 'The Witcher 3', directing users to the malicious URL https://ttraff.ru/pify?keyword=gwent+guide+the+witcher+3. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=gwent+guide+the+witcher+3
    • http://files.performanceptky.com/uploads/1/3/2/6/132695714/9428a70.pdf
    • http://wogep.bsakoaks.com/uploads/1/3/0/8/130814328/7431479.pdf
    • http://files.kcpanhel.com/uploads/1/3/2/8/132815961/1055807.pdf
    • http://files.vtnhcda.org/uploads/1/3/1/4/131452935/fevamokusip-tizibaganojufer-vilak.pdf
    • http://files.platinumeventsbayarea.com/uploads/1/3/2/8/132815872/wewonivoxeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/degetaguzatamapisoba.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/vonuzopapinokitim.pdf
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/definition_of_stressors.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4716/files/spelling_test_paper_20_words.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/99297557839.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/tapidiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/7398/4919/files/4504032505.pdf
    • https://cdn.shopify.com/s/files/1/0429/4977/1430/files/xoxagulezogovose.pdf
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/93292662556.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zudofujavulasosajawigubi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/demotufilonameviv.pdf
    • https://cdn.shopify.com/s/files/1/0439/3736/6174/files/mathematics_2_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/betijoxevokebofep.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/48049311881.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/
    • https://cdn.shopify.com/s/files/1/04

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4f0.bin
8eee08292a3b0236e45343ca6552efa6f7cb1a8200228714f361bafec57ed58a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F0 5068 bytes
font_01_sfnt_off0000c641.bin
cc8e9fe40e220384bb2388f8badb15b39b8dcd13179e58f65a743fa745144650		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC641 14000 bytes

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