Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf5004f33b19519…

MALICIOUS

PDF

49.9 KB Created: 2020-08-27 19:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfe84684596b006deb1d699a5c8077cc SHA-1: dc23d4d4930754a235cf6121403f226fcb6f33b4 SHA-256: daf5004f33b19519f561a430b9ef36c0044cca5802e97f1c5248f910f576bfb4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link to 'ttraff.cc' is identified as a malicious redirector. The document body, though heavily obfuscated, contains the text 'Film a critical introduction 3rd edi' and the malicious URL, suggesting a lure to download or view content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful sites.

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.cc/pify?keyword=film+a+critical+introduction+3rd+edi
    • http://files.hinckleyfestivalassociation.org/uploads/1/3/1/8/131856917/jasiked.pdf
    • https://cdn.shopify.com/s/files/1/0462/7690/3061/files/walloop_pro_apk_2019.pdf
    • https://cdn.shopify.com/s/files/1/0440/0473/7174/files/22232694960.pdf
    • https://cdn.shopify.com/s/files/1/0431/8740/4968/files/44110752041.pdf
    • https://cdn.shopify.com/s/files/1/0434/6970/1286/files/solid_black_background_android_app.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/11600389142.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29331550606.pdf
    • https://cdn.shopify.com/s/files/1/0446/9984/4762/files/38069251829.pdf
    • https://cdn.shopify.com/s/files/1/0428/8852/8035/files/pdf_to_dwg_converter_free_download_offline.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdf
    • https://cdn.shopify.com/s/files/1/0428/9187/0375/files/saxawetipanogole.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/77755921729.pdf
    • https://cdn.shopify.com/s/files/1/0427/4552/8487/files/nsp_bonafide_certificate_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/5091/6247/files/78512470086.pdf
    • https://cdn.shopify.com/s/files/1/0460/3553/3988/files/chinese_language_application.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dcb.bin
38ba86e1d801465cffbe32c465fa9e795936ef4bc432da4e7776e1639a0ea98c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCB 5024 bytes
font_01_sfnt_off00007ebc.bin
70b77ba28c39b56251cf3795b882b387a2fcd5a17328cfd0ca49998f739b3b99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBC 10248 bytes
font_02_sfnt_off0000a1c3.bin
c337dbbfb1fe420392cf20b6a61c2ffa605727382437dc3482e83c9812f23f52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C3 17200 bytes

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