Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed8e6288b92b79df…

MALICIOUS

PDF

48.3 KB Created: 2020-08-09 17:34:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17d4920048beba41683b70ea077e409e SHA-1: 4465df6a30cccb433938fd2c94928d1370bc4594 SHA-256: ed8e6288b92b79df1689cbda0c69d30f969cc187c6fca680e1338efd7f1528a7
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary malicious link identified as 'https://ttraff.ru/pify?keyword=complete+the+square+vertex+form+pdf'. This indicates a link farm or redirector strategy to lead users to potentially harmful content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body is heavily obfuscated.

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=complete+the+square+vertex+form+pdf
    • http://files.jancancan.com/uploads/1/3/1/4/131406413/sosazidisajawaj-ledosol-vaxodavuv-ziwobedomanefon.pdf
    • http://ruremufox.hillvalleyfarmdairygoats.com/uploads/1/3/0/8/130814124/230571.pdf
    • http://xobewiso.miamigardensflcarpetcleaning.com/uploads/1/3/1/4/131437657/wemub.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/baixar_livro_capites_de_areia_em_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1866/files/pic_assembly_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/2565/3160/files/coronary_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/19960924364.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8459/files/senipelovojobif.pdf
    • https://cdn.shopify.com/s/files/1/0434/2765/9932/files/the_aeneid_latin.pdf
    • https://cdn.shopify.com/s/files/1/0434/1995/9454/files/cambridge_igcse_economics_workbook_answers_susan_grant.pdf
    • https://cdn.shopify.com/s/files/1/0430/5171/2666/files/9438859350.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/chaos_rune_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7584/files/lufobepopidolewikasidede.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/4._3_vortec_engine_diagram_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/nunerajiferiben.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_off0000697f.bin
18589d083f0225fbe51725f230afa514140c60acf0d1a1f40f803a248886576d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697F 5284 bytes
font_01_sfnt_off00007b83.bin
792a3ff35327eacd70e488d6db07df00c8690a544eb3c5c53724c392d21111c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B83 13340 bytes
font_02_sfnt_off0000a64b.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA64B 4324 bytes

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