Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e30035907250cb…

MALICIOUS

PDF

67.7 KB Created: 2020-08-22 22:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6fcf91d679af1266000b89c3e40dd08 SHA-1: cac5060a0ee6891689474d5316cb38e7aae0542e SHA-256: 87e30035907250cbfd1a12daa36c6e8c1c44e68ee28530003187b30fffd7f274
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, with a critical heuristic identifying it as a malicious redirector link farm. The primary malicious URL, 'https://ttraff.ru/pify?keyword=valkyrie+profile+covenant+of+the+plume+guide', is flagged as potentially malicious. The document body, though heavily obfuscated, also contains this URL, suggesting the PDF's purpose is to distribute links to potentially harmful 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=valkyrie+profile+covenant+of+the+plume+guide
    • http://files.rpdk9history.com/uploads/1/3/1/4/131482953/7485085.pdf
    • http://files.iveymission.org/uploads/1/3/0/7/130775368/164eb2f4000a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/que_es_asepsia_y_antisepsia_en_enfermeria.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/74966642977.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/kanarerubamaboladejufurak.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4965/files/yasin_latin_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/8254/6341/files/53567160072.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/lirebamurapezuxipesozogi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/washington_dc_metro_bus_map.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9479/files/pepsito_aprendizajes_clave_preescolar.pdf
    • https://cdn.shopify.com/s/files/1/0429/0989/2767/files/96790426364.pdf
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/salud_y_ambito_laboral.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/definicion_de_proposito_segun_autores.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8369/files/cgegis_table_october_2020.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a405.bin
b7c326a69a95b3ec68a05375b87cb63556415615480d3a1c2c6ddafe5f536ee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA405 8080 bytes
font_01_sfnt_off0000bf3c.bin
eec9423dd22b1a2840661afe17e204e648ef1d863e868fe3695524b80c7941cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF3C 5580 bytes
font_02_sfnt_off0000d21d.bin
4e47f4fa7d632d47b126d0b107cafe26e0a2508a020c19e906d77f2dad980f01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD21D 15248 bytes

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