Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ff8542a47d0200…

MALICIOUS

PDF

46.8 KB Created: 2020-10-16 14:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4a1485906404143f1e7600557ada02a5 SHA-1: f1f58e2d16078b1eafb76d99a035ffbe1b185b9f SHA-256: 03ff8542a47d02001ec979bf0c6267305210b356b41c315724777ad66edf0f22
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://cctraff.ru/pify?keyword=south+african+dishes+recipes+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this malicious URL, indicating an attempt to disguise malicious activity as a recipe document.

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://cctraff.ru/pify?keyword=south+african+dishes+recipes+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f86fbc9b919b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f86fce226598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370294/normal_5f8974f56efe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f87101d93c20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f88fc1edc2b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f87edd368ff6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f889fedba5f3.pdfIn PDF document text
    • https://pasugewu.weebly.com/uploads/1/3/1/0/131071180/fuxegosimipu.pdfIn PDF document text
    • https://wirukibit.weebly.com/uploads/1/3/0/9/130969322/jaxozikolavi-nefuwakarikef-nuvade.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://cdn.shopify.com/s/files/1/0484/8461/4299/files/bill_of_sale_texas_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3284/5207/files/wps_wpa_dumper_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1057/9865/files/phet_simulation_collision_lab_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6211/7031/files/xoxonotam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb10b5a-1827-434c-84b9-516b040c4a8c/37442626176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83179683-df0c-4436-a5f1-8f20bfa4f41c/zazikirulikidulinemub.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_off00006b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4F 5196 bytes
SHA-256: 09e0723274e5ec98984367a37a7da34bdb9d2e5c5d2e6f8b3c36f1f80468c4de
font_01_sfnt_off00007ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE2 10280 bytes
SHA-256: d235038742b739cd0cffbfc809ebcf653d621af9834cf4c8a9d05ff0261d7cfe
font_02_sfnt_off00009fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FD2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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