Malicious PDF — malware analysis report

Static analysis result for SHA-256 caa7bb189f921750…

MALICIOUS

PDF

44.6 KB Created: 2020-09-14 02:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03fe70fac1f1c492a6beee24a47940d1 SHA-1: f2069d1762cb16111e7a45556f4c4f8c1458337e SHA-256: caa7bb189f9217509cb1c25442dce70d00579f08dca853be1407b8144f37d3d1
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to potentially malicious domains. The document body includes a URL that redirects to a malicious site, likely as part of a SEO poisoning or phishing campaign. The ML classifier also strongly indicated maliciousness.

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.link/wix?keyword=bostitch+sb+1664fn+manual
    • http://dawigo.justinedaisuke.com/uploads/1/3/2/6/132695780/2b81ae5d.pdf
    • http://files.brazeldazzlestudioz.com/uploads/1/3/0/8/130874493/1282229.pdf
    • http://files.ilketshallstandrew.com/uploads/1/3/0/7/130776381/13c5ec35.pdf
    • http://rurerilu.allprofreight.com/uploads/1/3/1/6/131637279/3895018.pdf
    • http://files.zizosa.com/uploads/1/3/1/3/131383330/9048821.pdf
    • http://faput.emilyervinphotography.com/uploads/1/3/1/3/131379846/89da60df28ee.pdf
    • http://legedose.superiorfirstaid.ca/uploads/1/3/1/4/131406427/gepovinugabizenugu.pdf
    • https://static.usrfiles.com/ugd/4d400c_42da5818e8744d21805a7d7a83120d7f.pdf
    • https://static.usrfiles.com/ugd/ba2c19_7218d915cd62441a835449d7fb918f85.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/15682030772.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/dajusigatuju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5866669006.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9957/files/xamarin_android_action_bar_back_button.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_off0000702a.bin
9e0d224ebd580fd2c70d7eec866506457f4ea4ecd182f410878575900bf3f05c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x702A 5508 bytes
font_01_sfnt_off000082d1.bin
f95a9bd8d891c59f169ef93d0f8b49351359e00afbffb8ff5a0b6b0072107bc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D1 10248 bytes

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