Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67d631d2cca3299…

MALICIOUS

PDF

42.0 KB Created: 2020-11-03 07:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f95ad5b29eaa8fa3a004234ab08dc8cc SHA-1: ddaf30eda84d8798ebd7a91dbef8b5ec578e4eb1 SHA-256: f67d631d2cca32991761a391796b1bd292578c8cac82d87177cb8b2f6e861a5a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.ru/123?keyword=halloween+escape+room+diy In 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/dbfc06b9-0166-4c9a-9aae-8126811ad58f/university_of_utah_day_parking_pass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c619e011-3d69-4bc2-8811-b0d6a29610ec/optiplex_9020_aio_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8444e29-df15-4799-9ab8-bf6f48ee736d/babenobujelut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9235/4247/files/3804440860.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/kisomuderi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc58144-54d1-4ef8-806c-3ee6f610cf54/82471334288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0512/4503/files/schumacher_electric_2_10_50-amp_12v_battery_charger_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2269/4579/files/chromosome_structure_labeling_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3698/3720/files/flight_track_pro_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c9b796-6f0e-4096-80a1-bf4592de7503/19257314368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8970/0027/files/21167770119.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5108/0087/files/medalifonujagetovosizedog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7975/4428/files/gestion_de_calidad_alimentaria.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B2 5376 bytes
SHA-256: 3d0ae35812c648942ff71b565135ac99b3e4f35ab623707b4b0622ad0253f471
font_01_sfnt_off000074f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F5 11728 bytes
SHA-256: 1bfdc90e42da95d9102fa384ef69c1b70967dbf3d1a052dd4351adff9119fd45

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