Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c936aa7c277e30…

MALICIOUS

PDF

47.7 KB Created: 2020-08-14 00:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26b067a0eb625cf63ecbf7bc16741e20 SHA-1: ad2bd6fe78d634b9450cdecac92672ff360ed8a3 SHA-256: 28c936aa7c277e309732fe5a67e2bfd42845e8230bdf85489ba0bc27448b2a78
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, disguised with game-related keywords, redirects to a known malicious domain (ttraff.ru). The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The presence of numerous external links suggests an attempt to drive traffic to potentially harmful sites.

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=naruto+ultimate+ninja+blazing+mod+apk+latest
    • http://kubafev.brucereevesswiftamericasartist.com/uploads/1/3/2/7/132741029/1099581.pdf
    • http://talika.oddballcraftscreations.com/uploads/1/3/2/3/132302921/pizepepa.pdf
    • http://files.monaconsulting.com/uploads/1/3/0/7/130775174/bebabuxavo.pdf
    • http://petuxusu.homesforsaleashecounty.com/uploads/1/3/0/7/130776795/bifijuzutuzas-xalutafodaxo.pdf
    • http://vivam.cfhsbands.org/uploads/1/3/1/1/131164250/6161695.pdf
    • https://cdn.shopify.com/s/files/1/0430/0154/4863/files/timejoxotesaxewox.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6910/files/manual_completo_de_aberturas_de_xadrez.pdf
    • https://cdn.shopify.com/s/files/1/0434/0049/5260/files/21003459487.pdf
    • https://cdn.shopify.com/s/files/1/0438/3296/7318/files/ruramosonirosuvuzidokaf.pdf
    • https://cdn.shopify.com/s/files/1/0436/1607/5939/files/59345323921.pdf
    • https://cdn.shopify.com/s/files/1/0439/2707/7032/files/rixemo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1920/5789/files/position_absolute_center.pdf
    • https://cdn.shopify.com/s/files/1/0433/6094/4296/files/balance_of_trade_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89089693040.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/kexokomudemavotudo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0091/2282/files/wexelolexe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/fuxogaripemasikawinigut.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/bailando_enrique_iglesias_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/kumegojunizefavani.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_off00006c90.bin
4b242847ac28af3ad07b6a2df48984e1e98c433e4bcdc68c126f076ebc1ce3f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C90 5460 bytes
font_01_sfnt_off00007f14.bin
ab200e90dc5ace8487a3e4b87b4614f2fac32c33c603ad315e880d14e314d39e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F14 10460 bytes
font_02_sfnt_off0000a2d6.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2D6 4324 bytes

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