Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7718c4e3f48a9b0…

MALICIOUS

PDF

53.6 KB Created: 2020-09-14 12:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d5c8063e0a15c4ff1b7550c12e49585f SHA-1: f62514f135990fb693c6404d83d78820c1722814 SHA-256: b7718c4e3f48a9b07c8a7955c74e8d38d1d46dca8bab599bd80a7191f8f0a1ac
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that are identified as malicious redirectors, specifically pointing to 'ttraff.link'. The document body suggests a lure related to a 'warranty letter template free', intended to trick users into clicking the malicious link. The presence of numerous external PDF links further indicates a link farm or redirection strategy, likely to obscure the final malicious destination.

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.link/pify?keyword=warranty+letter+template+free In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/957eb4_d04d7624db834d13a608282e9c4455bf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1acd69_e9b0ddb1679f460ebb461a0559874a56.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/88a84f_5a4123f9b1984c54afb7b0770b3d5e12.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8dde66_855b82d3e86341baacd2da88d635ed51.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8ab72e_8e98b9d81c8844bfbc64086f7b88d077.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/097bd5_1cb3edf37f0545bea15f4b6f1f04c460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5704/4904/files/restricted_holiday_list_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/81826627907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tedix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/2120/5405/files/popivogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7269/8006/files/weathering_with_you_full_movie_link.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5526/8518/files/angelica_hale_fight_song_mp4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7854/8630/files/california_rental_application.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/33426802214.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_off0000944f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x944F 4984 bytes
SHA-256: 699df45a332bd5af78db349fcce23e63c442b3f8cd59654ea740a491dad9db92
font_01_sfnt_off0000a543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA543 10692 bytes
SHA-256: 37296148bf3900f8d319b9052ad294cf79b0f651aed7abddd2777249ee45472a

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