Malicious PDF — malware analysis report

Static analysis result for SHA-256 c25046b133d8e996…

MALICIOUS

PDF

49.5 KB Created: 2020-11-05 02:10:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d1e0f6479f0831d1a23b707fc2b773b1 SHA-1: 77a97a02b682940b4ed5b20032181098d497c21f SHA-256: c25046b133d8e9963553c59813d3973bbcbac833d34137006c2e8a90b10198be
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/123?keyword=garmin+connect+manually+add+steps'. The document body also contains this URL, suggesting it's the primary lure. Additionally, a PDF link farm heuristic indicates the presence of numerous external links, with 'https://s3.amazonaws.com/lulelepese/family_gift_basket_delivery.pdf' being the first identified. The ML classifier strongly flagged this PDF as malicious.

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.me/123?keyword=garmin+connect+manually+add+steps In PDF document text
    • https://kiriwalukejogof.weebly.com/uploads/1/3/4/3/134310578/xawanara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417986/normal_5f9a7c599aff5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426944/normal_5f9c4dbf87136.pdfIn 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://s3.amazonaws.com/lulelepese/family_gift_basket_delivery.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/sebojowumizubilogudevixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b824156c-f1fa-417c-8b99-3247f0e2ae84/the_leadership_experience_podcast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecdf8fbb-7423-4ea0-8809-2b729eb3b3b6/graph_of_sec-1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a9db38-5cfe-411c-8447-306b27f24e13/jepam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61238a13-77fc-48f2-b749-74aec6d33041/felavumod.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/jinivu.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/88848988523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ab4c54f-ab07-4c3d-9a9a-800afbf550d2/jomatenutoxudojariv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a843ec56-563e-4c52-b68f-b73bc697e798/totare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cf02afb-a522-4f9d-b8bc-935d02d17613/stock_market_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b31d556c-68b3-488c-9da6-e6806f491d87/69546846904.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76AE 5236 bytes
SHA-256: c39d52fd7213368d54f608d79409d12b1b2e5abdbee0b4b259e02c7edd601eef
font_01_sfnt_off00008864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8864 10092 bytes
SHA-256: 82a11243042cc8d3a3508fffef62e81354e56142842e9c58b759516f2da1a003
font_02_sfnt_off0000aaaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAAA 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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