Malicious PDF — malware analysis report

Static analysis result for SHA-256 320bcb79b109c2e1…

MALICIOUS

PDF

34.0 KB Created: 2020-09-22 09:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 003fe46c7446cdde8fabb50aacc5c751 SHA-1: 45cb1af1c7154acca45eb56b2e00515617873680 SHA-256: 320bcb79b109c2e1da68a0bcb6f1548270727dc55151f8031542f7dd6cbdb690
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, many of which are part of a link farm designed to appear as search results for a pool manual. These links redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The ML classifier also strongly flagged this PDF as malicious. The primary intent appears to be directing users to potentially harmful websites through deceptive content.

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.club/wix?keyword=intex+ultra+frame+rectangular+pool+manual+pdf
    • http://mutelig.usclublax.com/uploads/1/3/0/7/130776769/xiduko-xitapa.pdf
    • http://xovekix.rearrangewithstyle.com/uploads/1/3/1/3/131379730/mazafezop.pdf
    • http://wifuriv.recoach.us/uploads/1/3/1/4/131453301/d8fcc25b288b7db.pdf
    • http://xilusaf.withvsat.com/uploads/1/3/0/8/130874431/cf7b2b.pdf
    • http://goxirerer.johnedwardwalsh.com/uploads/1/3/0/8/130874642/zuwawatu_fikorekup_kowinotopijofeg.pdf
    • http://boneso.stfrancesbasketball.com/uploads/1/3/1/4/131453741/f71994dc8.pdf
    • http://voditab.boothillherbs.com/uploads/1/3/1/3/131398097/9454860.pdf
    • http://pomumib.jamquest.org/uploads/1/3/1/4/131438111/8dee346f4f5ad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0412/4571/files/bluescope_steel_roof_sheeting.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3042/files/zupagejuxovoge.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/tutatobimilesap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0042/1790/files/78355048318.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_off000044dc.bin
e8d98e284b4dd9313d3e4346ef4c7146aaf993f0db3c852075bd4daaa5747d2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44DC 5304 bytes
font_01_sfnt_off000056d7.bin
979a3ac288b5c74fca57d526bf950aaeae1bce6a0826487dc4ae55dce2c00a2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56D7 10156 bytes

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