Malicious PDF — malware analysis report

Static analysis result for SHA-256 c20c401693a9162d…

MALICIOUS

PDF

35.7 KB Created: 2020-08-08 13:35:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 106fe77139c7b82aae2bcc52be82b221 SHA-1: 24b5c0dec9843e951ef4a157b39c3db4df6a8d57 SHA-256: c20c401693a9162d754883e0c51127f3f5dd0911af6660f6fcb2c49ba0d62b92
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. It also features a large number of embedded links to other PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.ru/pify?keyword=les+secrets+de+la+communication+richard+bandler+john+grinder+pdf, which likely serves as a gateway to further malicious content.

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=les+secrets+de+la+communication+richard+bandler+john+grinder+pdf
    • http://files.artisanwineandcheesecellars.com/uploads/1/3/1/4/131406473/1053557.pdf
    • http://files.cyannesze.com/uploads/1/3/0/9/130970009/ponotuxuzimebig.pdf
    • http://files.cfanem.org/uploads/1/3/1/8/131871501/6264324.pdf
    • http://files.booksatafifth.com/uploads/1/3/0/7/130776575/xufupujixofawo_sefege_pukarepizav_jeguratul.pdf
    • https://cdn.shopify.com/s/files/1/0428/4894/4284/files/79488734564.pdf
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/78632052760.pdf
    • https://cdn.shopify.com/s/files/1/0435/1492/1112/files/kirepudepidoxifesuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/0722/0635/files/anualidades_diferidas_y_perpetuas.pdf
    • https://cdn.shopify.com/s/files/1/0438/3368/8226/files/93823805796.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2478/files/koragipixuvovebixoxafebid.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9996/files/nekogav.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/lagirep.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/how_to_solve_abstract_reasoning_questions.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2056/files/28607561354.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5671/files/zejagosaji.pdf
    • https://cdn.shopify.com/s/files/1/0438/1969/6288/files/basic_calculus_college.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004abb.bin
6bc147eda5c7f90edf337392221c4a07a4c88183ebefa521b3b34bbb7c2c0a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ABB 5724 bytes
font_01_sfnt_off00005e19.bin
8325f562030306019bbebcdb95815e79e344052ef42c0ecb8e71f16bb049850a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E19 9720 bytes

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