Malicious PDF — malware analysis report

Static analysis result for SHA-256 7521a8f1487a8b84…

MALICIOUS

PDF

43.1 KB Created: 2020-08-10 07:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd6607c4d8ce305347283145a74ca4c7 SHA-1: bef919b06af6ff28bc0a99d38efd2a69d31c98db SHA-256: 7521a8f1487a8b84e914c78caccc02b29c0014870f4e02964efd551782970c80
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for an advance-fee scam lure, indicating it tries to trick users with promises of prizes or funds. It also contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains a URL that matches the redirector, suggesting the primary purpose is to facilitate this redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=abstract+nature+of+mathematics+pdf
    • http://files.joshuastringerartist.com/uploads/1/3/2/7/132710783/cc2ebe7b919cf5.pdf
    • http://gawupon.angelsincanada.com/uploads/1/3/1/8/131856372/pumok.pdf
    • http://files.ravenaterra.com/uploads/1/3/0/8/130814397/vukokag_goxemotujoxek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/8428/3033/files/13852682726.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4843/files/gizabisuzaxon.pdf
    • https://cdn.shopify.com/s/files/1/0431/9831/6705/files/bezigirikirojeke.pdf
    • https://cdn.shopify.com/s/files/1/0433/2807/7992/files/lupek.pdf
    • https://cdn.shopify.com/s/files/1/0448/2344/5666/files/gijezatoxibuvo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9074/6267/files/fasesetaduvuvifedodivix.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/bawadotigudeke.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2505/files/cementum_slideshare.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/rogevakilexar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89352644259.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/lagakasokofumunavazu.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_off00005bb7.bin
33f74f74a6d6669e59bf6ea75452ebce14f1d5da9c76c02119d4b04d65751ba7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB7 5372 bytes
font_01_sfnt_off00006db9.bin
f30bd473827ac1827a0d996af9070d675f8a587343752fab3d9c1eb844b7473e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB9 10412 bytes
font_02_sfnt_off0000916b.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x916B 4324 bytes

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