Malicious PDF — malware analysis report

Static analysis result for SHA-256 323ef6d48e3b7367…

MALICIOUS

PDF

47.0 KB Created: 2020-08-13 15:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a9669f7c78a6e6fb072ac2b48fa3277 SHA-1: 7ee08f869a17736c8f9ea1bf10a4ca2a410c493a SHA-256: 323ef6d48e3b73670b1c0f22efe838567ab80da04740d230d5372010103f3c0f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics, including PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM, indicating it contains a large number of embedded links. The primary malicious link identified is https://ttraff.ru/pify?keyword=de+institutione+musica+boethius+pdf, which likely serves as a redirector to a malicious site. The document body, though heavily obfuscated, also contains this URL and numerous other links pointing to Shopify domains, suggesting a link farm designed to distribute malicious content or phish users.

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.ru/pify?keyword=de+institutione+musica+boethius+pdf
    • http://files.wjcreativestudios.com/uploads/1/3/0/7/130739524/ec93ca34ed31075.pdf
    • http://munemura.clonesac.com/uploads/1/3/2/7/132712615/vadizubalapiriko.pdf
    • http://files.holywaterbooks.com/uploads/1/3/1/6/131607331/9fabed55a7a27.pdf
    • https://cdn.shopify.com/s/files/1/0448/3235/8560/files/livro_axiomas_de_zurique.pdf
    • https://cdn.shopify.com/s/files/1/0430/2074/6906/files/nozesudaw.pdf
    • https://cdn.shopify.com/s/files/1/0451/0469/3400/files/aroma_english_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/40316393043.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/juxupajajivamuwiri.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/19633802556.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/jarefusulanolasiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5911/files/automatic_car_wash_system.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1336/files/46620841000.pdf
    • https://cdn.shopify.com/s/files/1/0435/7931/0239/files/31984686703.pdf
    • https://cdn.shopify.com/s/files/1/0440/3996/2774/files/sewaledonupa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/jidijedekavasejukowilu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3062/files/69076994624.pdf
    • http://id.loc.gov/authorities/names/no2013034999
    • 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_off00006cbc.bin
50857223923f651ba5e9e8d5919003bd05f3e663feb88c11d0144bfc039f5012		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBC 5288 bytes
font_01_sfnt_off00007e8a.bin
061b56dd640fbeab3d5bae7c2cd7ba6c01d64dbb39ced6fccb2b4c1139eaf99d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8A 10060 bytes
font_02_sfnt_off0000a0eb.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0EB 4324 bytes

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