Malicious PDF — malware analysis report

Static analysis result for SHA-256 f41ed236abf2cf77…

MALICIOUS

PDF

44.2 KB Created: 2020-08-18 22:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abb66d1d9d9a4a2905f6b6f609461066 SHA-1: dd83e14ee7b00619863baa8f78afde2703118be8 SHA-256: f41ed236abf2cf77ea7adce451d341bf6aa38d5436a0c8f33719d2134d3e0721
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=android+studio+3.+5+bugs'. This URL is presented within the document body, disguised as information about 'Android studio 3.5 bugs'. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on cdn.shopify.com, though the primary malicious intent appears to be the ttraff.com redirector. 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.com/pify?keyword=android+studio+3.+5+bugs
    • http://vexixo.iriscleaningservice.com/uploads/1/3/0/8/130874082/talonune.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/arizer_air_2_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0441/0540/0472/files/suwoluz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2830/8387/files/89825882628.pdf
    • https://cdn.shopify.com/s/files/1/0438/1566/5824/files/63437552725.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/68298235184.pdf
    • https://cdn.shopify.com/s/files/1/0439/2783/0696/files/jatosewoki.pdf
    • https://cdn.shopify.com/s/files/1/0437/4007/0042/files/99768268702.pdf
    • https://cdn.shopify.com/s/files/1/0435/5375/1189/files/94042573831.pdf
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/23216135719.pdf
    • https://cdn.shopify.com/s/files/1/0439/6518/6206/files/gepatidewipul.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_off00007066.bin
cdec6e197d7566ed9f1aecef489d6ce7b3fdbce0efd021585601e0fca391fad3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7066 5200 bytes
font_01_sfnt_off00008224.bin
a7f4a951adce046061d52ebc3019b69625453fc9d2ffe88d995eb7459f51c231		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8224 10060 bytes

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