Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2362e221e59405…

MALICIOUS

PDF

42.2 KB Created: 2020-11-03 06:06:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7e04a91550935b992df978e1c6cfacb7 SHA-1: 1f0b386dbe47c662443636026858b0289b36bfaf SHA-256: 1c2362e221e594056f6b2efffa032a1a0f875fd33711c30c2f57cfa193d41ad9
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link identified is https://gettraff.ru/strik?keyword=crown+flour+mill+limited, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting a link farm or SEO manipulation tactic to distribute malicious content.

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://gettraff.ru/strik?keyword=crown+flour+mill+limited In 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/1/0482/0683/9962/files/transfer_contacts_from_iphone_to_android_bluetooth.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuwaterexaf/fuloxekevewitebixopenaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e2456d2-8a23-404f-88b3-e3e2e72d5f50/gaxomirirubevezete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36ec434c-7957-4164-a188-d2bdd515297c/bubuf.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/blood_thicker_than_water_fabolous.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/fin_rot_treatment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f3c0c37-2e57-425b-aee0-2dadbfb6fe52/webajipogavuguzuro.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/camft_conference_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/kimoweworape/corvette_stingray_concept_1959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b0934f-30d8-4f71-8a40-a29c238c5f1a/la_soberania_de_dios_chuy_olivares_m.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/bfa_leatherworking_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/electro_shock_remote_electric_flashlight_wand.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/nixizamevitekemovi.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/nodunirojamoli.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/jeep_owners_manual_case.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_off00006748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6748 4660 bytes
SHA-256: ce1216303cb8e9afa1b5b271b43a771d8ca3bc84ff4654ee41a93d114d3104de
font_01_sfnt_off0000771d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x771D 10916 bytes
SHA-256: 5a0172235e828960964ea7068d9f481a75523a93f7fbf6c47280839fc9c15435

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