Malicious PDF — malware analysis report

Static analysis result for SHA-256 c23e5ce964d36053…

MALICIOUS

PDF

67.4 KB Created: 2020-09-07 02:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 959ce7a60baee5d9800e8a2cd927dcd0 SHA-1: 6e108fc7812712aa6e57e195050d1a128e4b6d6d SHA-256: c23e5ce964d36053f3c2c89e24eab83005fc259c0539eb3286d2e67bf333a063
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to disguise malicious links as academic resources. The presence of numerous external PDF links further supports a link farm or SEO manipulation tactic.

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.com/pify?keyword=cambridge+certificate+in+advanced+english+book+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/0373/4184/files/leon_county_booking_report_october_9_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4247/1064/files/dodanafetatagivunuxitaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6212/2903/files/minecraft_auto_clicker_hack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1791/0944/files/macbeth_character_analysis_essay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3096/2588/files/suwuviwobudu.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b4cc2e1d8739428d80427be9b2dc7698.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d43733_df24a9b3d5e945019ebf5057102c87d9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d38238_44caf4f2f1804c0c9cba4161f4e176fc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/097bd5_e47730e2de8d4854bb5e7546d00bdfe0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1d5a3f_c04aee84263c419a9fe7e24d3ae85c46.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/eb5a6a_c7fd5b3fa87946a6bdf0577124baec61.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e8e253_0bcf51330bbd42bb9473aeb1f77386a1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a4c1fa_70a1c36a60084105a91098c382f7225a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4dbf3f_190882bb2cb14f5486b7564396a33445.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9f69bd_160ddf3598e945a7995a31c81cb70799.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e948c1_38453384a59740e28e5ffe9ddb76c266.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9117e0_c3f294327a6145b4ae2f30f25f16bed1.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_off0000bdbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDBD 2828 bytes
SHA-256: a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
font_01_sfnt_off0000c7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B7 5736 bytes
SHA-256: 36c48876c3bb5f1465b17736ac39a8a9c3461f93e93bb472eef1b9634ca48ecb
font_02_sfnt_off0000db12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB12 9932 bytes
SHA-256: e26df1fb7d26eaf1d32edafed8359739202c1848a4ce08e219c632f2e95a2e86

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