Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8684160d64148d…

MALICIOUS

PDF

49.8 KB Created: 2020-08-19 05:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab2d9856cd7367f0233a7d1a04d21ba7 SHA-1: 2678e0fae70c1ff092c5a780c137e95080fa5324 SHA-256: 4f8684160d64148d6abd73af99d4dbb6619f10adaee6b6fae009b54b4d575242
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The heuristic firings indicate this is a malicious redirector and a link farm. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be corrupted or contains minimal readable text, but the presence of the malicious URL and the link farm strategy are sufficient indicators of malicious intent.

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=bootstrap+textarea+form+template
    • http://sevigi.linapunischool.org/uploads/1/3/2/7/132712358/bujuxopewixaki_tibakanoneg.pdf
    • http://kagawino.advantagetraininggroup.com/uploads/1/3/1/1/131164250/varolofotozodut_lutalak_kumaxutapej.pdf
    • http://tanivolel.sagecrystaltraining.com/uploads/1/3/2/6/132696414/raguwel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59854739703.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/zilidimer.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/jovulunogezog.pdf
    • https://cdn.shopify.com/s/files/1/0432/8855/9782/files/xovajudade.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/magejuvikuretut.pdf
    • https://cdn.shopify.com/s/files/1/0431/4811/6119/files/caremark_specialty_prior_authorization_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/3219/0876/files/95623738777.pdf
    • https://cdn.shopify.com/s/files/1/0437/9449/7698/files/54385748497.pdf
    • https://cdn.shopify.com/s/files/1/0449/7804/5086/files/veram.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/sawadomef.pdf
    • https://cdn.shopify.com/s/files/1/0435/3743/2744/files/conversions_length_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/hesi_pharmacology_study_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075c0.bin
2cd0d9f26d6aafa0e94851009b3e5386306d1cbc5d3a3bd148fc64bf4dbc5133		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C0 5164 bytes
font_01_sfnt_off00008747.bin
c4c92f03fdcf6e65830e4d0de8f4373a61a861ea73901e36e5d41510f3b5de3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8747 15692 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.