Malicious PDF — malware analysis report

Static analysis result for SHA-256 7686c48acb3f2205…

MALICIOUS

PDF

89.7 KB Created: 2021-01-03 14:20:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c32da00978bab5dac96ceb613b848c53 SHA-1: 7ff634af2e06eb6cc8f46322aed00318782de68f SHA-256: 7686c48acb3f22051ffa2d5febc3129b271c4c780632dab4beb05a4496c29a0c
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious or SEO-spam content, as indicated by the PDF_SEO_LINK_FARM heuristic. One prominent external URI, 'https://traffine.ru/123?utm_term=petsafe+1000+shock+collar+manual', suggests a lure related to pet training equipment. The ML classifier also flagged the PDF as malicious with high confidence. While no scripts were explicitly extracted, the nature of the link farm and the ML detection strongly suggest malicious intent, likely to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/123?utm_term=petsafe+1000+shock+collar+manual
    • https://static.s123-cdn-static.com/uploads/4420911/normal_5fcf03c70fb2b.pdf
    • https://cdn.sqhk.co/podiwilur/geeY6t7/magenta_smart_home_base_2_blinkt_wei.pdf
    • https://lusenivusimutom.weebly.com/uploads/1/3/4/8/134887898/gozabupewe_lukuvoragi_tinusezobuji.pdf
    • https://cdn-cms.f-static.net/uploads/4414501/normal_5fa91e32e908a.pdf
    • https://cdn-cms.f-static.net/uploads/4479439/normal_5fd9978cbcb2b.pdf
    • https://cdn-cms.f-static.net/uploads/4402501/normal_5f9323d7dea8a.pdf
    • https://cdn-cms.f-static.net/uploads/4403557/normal_5fbddc23cf2b8.pdf
    • https://cdn.sqhk.co/samigimas/VnggyIu/stretches_for_flexibility_splits.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zesotat/android_app_barcode_scanner_code_39.pdf
    • https://uploads.strikinglycdn.com/files/9f0bd81d-7e94-4f5b-b9ca-2544caac7a01/epic_skater_mod_apk_2._0._31.pdf
    • https://uploads.strikinglycdn.com/files/6a4a5ba4-e42c-497c-a840-1fb79390ef97/les_inaptes_au_travail.pdf
    • https://s3.amazonaws.com/kesumasaka/jufikulidizutezag.pdf
    • https://uploads.strikinglycdn.com/files/816fb5f6-9309-454c-b040-c045f0e46338/whos_the_baddest_sho_nuff.pdf
    • https://uploads.strikinglycdn.com/files/c66e9920-4bef-43f5-b925-aece41da20d3/chase_near_me_hours_of_operation.pdf
    • https://s3.amazonaws.com/xilasisefi/dce_senior_high_weston_wi.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4c5.bin
da7aae6dda60406e84c84a97462cfb90cf318cd43c7a9808cd39a08d97090638		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C5 5212 bytes
font_01_sfnt_off0001064e.bin
11789dff25087c869e2a14d04859f37f9851073050135e7d1adc9d16ee55471d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1064E 11512 bytes
font_02_sfnt_off00012c87.bin
b85936d25a32bc22ebcf3cb50ccffac79c3accd0f2e88a5e67ec7acb40974be3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C87 18264 bytes
font_03_sfnt_off0001494e.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1494E 4324 bytes

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