Malicious PDF — malware analysis report

Static analysis result for SHA-256 acaf14be1f3699f9…

MALICIOUS

PDF

67.7 KB Created: 2021-01-02 06:04:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: cbe0212fd0ec05ceff7c13bf94c2c346 SHA-1: 656ed0a1e2d818d52d3eaf82f7642e083de7a401 SHA-256: acaf14be1f3699f92d091d408111c5a7759a520f73c8d44ca1c4762bafe13b03
192 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a redirector link to 'traffine.ru'. The ML classifier also assigned a high probability of maliciousness. The document body, though partially corrupted, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The presence of embedded URLs and the critical redirector finding strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wb?keyword=music%20jumper%20for%20sale%2010x10 In PDF document text
    • https://cdn.sqhk.co/zudilubal/dijxyia/tawewotorafifirogu.pdfIn PDF document text
    • https://cdn.sqhk.co/gudopokobipa/giCKIBz/slot_car_racing_tracks_uk.pdfIn PDF document text
    • https://dobopekajami.weebly.com/uploads/1/3/4/3/134314215/rifuwejekafobozal.pdfIn PDF document text
    • https://tuwavufubuxa.weebly.com/uploads/1/3/3/9/133997694/cc0593cdd0cf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528260/normal_5fe86099aa5a0.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/WO6KZ9G/babylist_registry_box_reviews.pdfIn PDF document text
    • https://jofomozali.weebly.com/uploads/1/3/5/3/135387403/9462223.pdfIn PDF document text
    • https://fuvexowigirupog.weebly.com/uploads/1/3/4/8/134896800/rukezenem-bumesun.pdfIn PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/nafunoruwoj.pdfIn PDF document text
    • https://fexejolimoti.weebly.com/uploads/1/3/4/1/134131812/54d045e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449205/normal_5fe85fe562a63.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/715c416c-bebf-4156-b4c9-df35e5d54df5/tapped_out_hack_reddit_free_donuts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bda0d28-64f0-4c78-bd6a-9b935877a609/hesi_a2_study_guide_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852fd950-73a1-4add-8e96-07ce18436e1b/41347197107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f299a00e-755d-4554-9d7d-6bf0b70e4d11/man_down_lyrics_grieves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b3f5d91-f705-4538-b7d0-7f028f1444a2/vojudukasumomudu.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_off0000c8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B3 5504 bytes
SHA-256: b54d5b6a03e5ff457b0b11d62aa596fedc64ca28f17863da316d066d0dfe2683
font_01_sfnt_off0000db71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB71 10780 bytes
SHA-256: b416ee43bb3e7fc2c5d0db1096509588d1149b587cd523c757f0611e566efccd

Open this report in the interactive analyzer, or submit your own file for analysis.