Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48ddb5fbd4532dd…

MALICIOUS

PDF

59.6 KB Created: 2020-08-12 00:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e181d8ab13ac80110822b3c055bf5608 SHA-1: c714facb7a16579d2108a3efbea8f3edc1ede764 SHA-256: d48ddb5fbd4532dd8c66c20cf3aa1de80d0c39aca3634a925da7724327156d5f
154 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a malicious redirector, with a critical heuristic firing for a link pointing to known malicious infrastructure. Additionally, a large number of embedded links were found, suggesting a link farm designed to obscure the ultimate destination or to distribute traffic. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of specific payload delivery mechanisms.

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=riptide+chords+uke+pdf
    • http://fuzuvim.doityourselfdocumentaries.com/uploads/1/3/1/4/131453832/8097349.pdf
    • http://files.angel-lisa.com/uploads/1/3/1/4/131453267/2952073.pdf
    • http://files.beautyandherstory.com/uploads/1/3/1/8/131872105/pofuniresotado_ralawija_xulebutubatawuk_wubadonofo.pdf
    • http://files.mapleafdals.com/uploads/1/3/1/4/131454766/6614416696.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/13793252138.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/digital_photogrammetry_theory_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8932/files/kenmore_80_series_washer_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7446/1594/files/basilea_3_completo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1261/1481/files/risk_management_process_examples.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/norton_anthology_of_african_american_literature_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3335/files/valurodamuketikoroludurap.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/71689083941.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/61732991151.pdf
    • https://cdn.shopify.com/s/files/1/0437/8211/1381/files/important_synonyms_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/4537/1549/files/classifying_polynomials_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5910/files/kisomezetexivamozidifiz.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_off0000882d.bin
e7efc389577c8d116b953795bb500a2c5339a58c6aca8372a155fdfd96ce5e74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x882D 5072 bytes
font_01_sfnt_off00009971.bin
3861b929c7bc9597d88de0fa09b485f0de3a552488c5a29619b4f1c55922f14c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9971 16348 bytes
font_02_sfnt_off0000cc1c.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1C 16204 bytes

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