Malicious PDF — malware analysis report

Static analysis result for SHA-256 1820f8d00f668f8a…

MALICIOUS

PDF

41.6 KB Created: 2020-08-15 07:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1befaa4be981d1fba8d356a3026a0bf3 SHA-1: aef6471fc450a5ddb0bb488ab637bc11957a8409 SHA-256: 1820f8d00f668f8ae9710e4926b1e0ecb85f0d2b960038eca06c3a7a5b0d3f23
202 Risk Score

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 'ttraff.com'. Additionally, it exhibits characteristics of a password-protected archive lure, suggesting the document is designed to trick users into downloading or opening a subsequent malicious payload. The presence of numerous Shopify links, while mostly benign, contributes to a link farm tactic. The document body contains a URL that is also present in the heuristics, indicating a potential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=lock+certain+cells+in+excel+spreadsheet
    • http://files.theartofjennifermcintosh.com/uploads/1/3/0/7/130740625/2815384.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/makalah_konsep_dasar_akuntansi_manajemen.pdf
    • https://cdn.shopify.com/s/files/1/0434/5643/0230/files/play_store_kaise_kare_laptop.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/57618455678.pdf
    • https://cdn.shopify.com/s/files/1/0438/3208/2594/files/kokujebapoturupe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/faruwomusajeligokisoni.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/22012434770.pdf
    • https://cdn.shopify.com/s/files/1/0437/8991/0165/files/tuwoxarilevilivagujebepot.pdf
    • https://cdn.shopify.com/s/files/1/0429/5622/6716/files/liturgical_year.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/xurekopegumuburugotim.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9213/files/new_destinations_level_b2_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0439/0515/5227/files/fodmap_diet_sheet_nhs.pdf
    • https://cdn.shopify.com/s/files/1/0434/4712/4130/files/analog_and_digital_sound.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c9a.bin
4b76b630a775dc6c3c333e2c6c317e4260d14e27e4d8cc2425f938b7146e0fff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9A 5236 bytes
font_01_sfnt_off00006e50.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E50 1800 bytes
font_02_sfnt_off000076de.bin
3c3b22b84067464defb88a60390fab4133b096bc2d8628e8d53aa458bb24b47b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DE 10080 bytes

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