Malicious PDF — malware analysis report

Static analysis result for SHA-256 931f30d3a52cc496…

MALICIOUS

PDF

48.3 KB Created: 2020-08-08 20:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8b7b05b7bb32b454a59cc37250422a8 SHA-1: 87e653a94bf75c2fea0b22e803eaf487ea112030 SHA-256: 931f30d3a52cc4961a8ace9dca51835f16676cd3bfd773a4cede33104f30194c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic firings indicate this PDF is part of a link farm, likely for SEO manipulation or to distribute malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=que+es+presion+hidrostatica+en+fisica+pdf. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=que+es+presion+hidrostatica+en+fisica+pdf
    • http://pixusop.geneortega.com/uploads/1/3/0/8/130814017/vekulosejafitolo.pdf
    • http://files.survivinglogic.ca/uploads/1/3/1/8/131871499/sagizisawilesobuzilo.pdf
    • http://mibudeda.texasumbra.org/uploads/1/3/1/4/131406149/kogeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/54620816225.pdf
    • https://cdn.shopify.com/s/files/1/0433/9489/1943/files/xeguvowizizade.pdf
    • https://cdn.shopify.com/s/files/1/0433/4125/0714/files/ielts_writing_task_2_examples_band_7.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/85523509375.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/muxifoxeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/catalogue_cadivi_h_th.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/utilitarianism_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/3701/5719/files/159998140.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/31195987214.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/13563968310.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/22129878875.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/
    • https://cdn.shopify.com/s/files/1/0432/3701/5719/files/15999

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000610f.bin
75b6e3f4b56ea4bb67948527893baf526770b733613639024553643157b298fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x610F 5272 bytes
font_01_sfnt_off000072f6.bin
d2b4bd4f13ee825b3db2fe9468600cf38f308894b32365674a9e8df361028049		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F6 13736 bytes
font_02_sfnt_off00009d26.bin
b01c3044e69f99e1dd6630ff63a75bd996a5b0513dc473f39d14a928191dbfc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D26 16108 bytes

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