Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceda4833256afc14…

MALICIOUS

PDF

44.6 KB Created: 2020-07-29 10:40:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c18f99eda129a9b3c9a6e04848c89ee6 SHA-1: 9c4d5531c00c38a52c948c716977a6097e5f2d02 SHA-256: ceda4833256afc141e22e6ee36fe705bc8dde71393c0a5a9e873c6c3f06938d3
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. This indicates a phishing or redirection attack designed to lead users to malicious content. The ML classifier strongly supports the malicious verdict.

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=parametric+and+nonparametric+statistics+pdf
    • http://files.moodypig.com/uploads/1/3/1/1/131163705/jasatap.pdf
    • http://files.lexphotoscan.com/uploads/1/3/0/7/130775867/b441f905bb671b.pdf
    • http://files.cotuithistoricalsociety.org/uploads/1/3/0/8/130813531/2156604.pdf
    • http://files.ancestral-pathways.com/uploads/1/3/1/4/131453188/savaxeruzuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7201/files/ganabifepexop.pdf
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/lomavobazofamegu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/jedetepebanoxizugemiwo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6939/files/vikudisowefegikotobobifo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9462/9786/files/gumamojome.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/tunimafibikaboxosududaja.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/86416949799.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/lufudoravut.pdf
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/84831813477.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/sumumuwekolef.pdf
    • https://cdn.shopify.com/s/files/1/0434/7992/4902/files/jajixake.pdf
    • https://cdn.shopify.com/s/files/1/0429/6946/4991/files/52541765729.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/1/0431/9569/5266/files/jedetepeb

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007193.bin
a69f1196a9dcca1bfefcac3a636765b7662e25d3d582c5e69eccae3ba4ccca7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7193 5060 bytes
font_01_sfnt_off000082a1.bin
11603844299f211f5cee29fbdc5dcb97bdcd685e87dae2862b71c6dc3aa80172		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82A1 10040 bytes

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