Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff19eebc793f9bcc…

MALICIOUS

PDF

37.7 KB Created: 2020-10-19 00:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 4e95530429073ce1bda80c248a527374 SHA-1: e859871812a66cbdde462e60309a345416c4baf3 SHA-256: ff19eebc793f9bcc45f14c04939db41418f540f02c19e76f9907083b1d563231
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body also contains a URL that appears to be a lure for downloading software. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to 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://ggtraff.ru/123?keyword=download+qq+international+english+version+for+android In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/monirafulowafix.pdfIn PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/b9289.pdfIn PDF document text
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/6681048.pdfIn PDF document text
    • https://rutaluxunenore.weebly.com/uploads/1/3/0/7/130740368/juzet.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/36d8f7e51.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6af17756-ff5f-4011-bc9e-58c2cc8bc5a4/kekipunoxomon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be7e6595-9be6-4977-921d-c83e605f8b40/51505482752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff81013-100f-4c89-9688-3f60ca88dd09/53797600448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ea079cc-3239-4651-8a55-fa68ce82de80/kiminunixitidazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c7761f-46dc-4912-b5c1-436f306856af/xagenapawudapegukefonixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2d6f95a-46cc-49b6-80b9-4bf59f427f29/tujopoginixor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b6eb2fb-4c6e-4b9f-b74b-941d4aa9e84d/12039410105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ed0d330-8411-4760-8e3e-6e0f2e9d3fa6/dr_dre_compton_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8763/5644/files/muvagoxabuwekota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6898/3969/files/32254029753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4793/9996/files/that_time_i_got_reincarnated_as_a_slime_manga_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1498/8198/files/52277251509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3000/2336/files/14398629570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2220/8152/files/edtpa_passing_score_washington.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3997/6345/files/basic_arrhythmias_7th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5033/5384/files/greek_arete_quotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9361/3989/files/8034792423.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000561e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x561E 5444 bytes
SHA-256: 336290168e6df9cddba02272ecc58cd06645bc01f5d7286d64f7ecddafa87043
font_01_sfnt_off000068b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B0 9524 bytes
SHA-256: 4560064a7d9be129ea7880ebf51118937894522d6951f02d2452a54ac72cbd2d

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