Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e7ac9db31a00bc…

MALICIOUS

PDF

35.8 KB Created: 2020-10-07 00:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 425a9830ba5ff818b5b498b7737a88a9 SHA-1: cf248c4883a43f6c0cea617d2c45b2264136961b SHA-256: 20e7ac9db31a00bc2cfe09039550aebe02eb8d37931db80a94f239063d886229
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files, many hosted on Shopify. One of the primary URLs, 'https://ttraff.club/pify?keyword=word+whizzle+answers+famous+artists', is identified as a redirector.

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.club/pify?keyword=word+whizzle+answers+famous+artists In PDF document text
    • https://site-1039488.mozfiles.com/files/1039488/96353495618.pdfIn PDF document text
    • https://site-1037130.mozfiles.com/files/1037130/penupawox.pdfIn PDF document text
    • https://site-1040687.mozfiles.com/files/1040687/41274215348.pdfIn PDF document text
    • https://site-1036816.mozfiles.com/files/1036816/25000499474.pdfIn PDF document text
    • https://site-1037875.mozfiles.com/files/1037875/fokumogolupoduw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5541/9044/files/lujugajixan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4583/7208/files/how_to_configure_gmail_in_outlook_2007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0987/8427/files/knee_pads_volleyball_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7087/1970/files/movunobudedomisapewowumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2131/9323/files/sniper_3d_assassin_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1530/6405/files/vototonugojanozuxadotov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6596/6231/files/ksu_general_education_requirements.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1812/0099/files/dovekamaxomuzabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1213/6855/files/6796379764.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EA4 5304 bytes
SHA-256: 45a2b89c8626c6568fe065ef0b21b178d30da12d178741defd4acce083349dab
font_01_sfnt_off000060a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A3 9868 bytes
SHA-256: e7692548e854c282a154fce7a22a2200b018c8cb0930a9241fce67b369f6cfef

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