Malicious PDF — malware analysis report

Static analysis result for SHA-256 22dfd9c9fc6640a6…

MALICIOUS

PDF

45.8 KB Created: 2020-08-04 20:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2bad08a9e4bfd78b35598b313715276 SHA-1: 9715e611640ef8df1abd6f7bbf41760fae90e5d7 SHA-256: 22dfd9c9fc6640a69e6f78a113ee3f65e83819ab1fdf2af140941ecb74875c79
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a link farm with numerous external PDF links, many hosted on cdn.shopify.com. The embedded URL in the document body, 'https://ttraff.ru/pify?keyword=cdf+from+pdf+python', is the primary indicator of malicious intent, likely serving as a lure or initial stage for further compromise.

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=cdf+from+pdf+python
    • http://files.intercultural-stimulation.org/uploads/1/3/1/4/131454221/61e97fd4a14a.pdf
    • http://files.lifewisegifts.com/uploads/1/3/0/8/130874128/6ab8d3.pdf
    • http://files.kingslandchess.com/uploads/1/3/1/3/131380741/woxajojo_vurobuzuwobar_lokuzakomu_megetepuwebi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/28249104867.pdf
    • https://cdn.shopify.com/s/files/1/0438/9250/6779/files/imagine_dragons_believer_lyrics_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/sql_server_trigger.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/17866683288.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xizijifopaxefiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5601/3205/files/11317911726.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/wifi_network_manager.pdf
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/54790918718.pdf
    • https://cdn.shopify.com/s/files/1/0432/8764/2270/files/52272014155.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/62777161940.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/foxit_editor_full.pdf
    • https://cdn.shopify.com/s/files/1/0428/6670/4550/files/kozomiteguxarizifaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/volobufepafolosovi.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_off0000717a.bin
ae0a3e3db39b6b58c2a81e1b486d182aa81c18e97ec6ec912ff785cf6b9a85a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x717A 4868 bytes
font_01_sfnt_off000081e3.bin
cd450277f599f601a88bb4046b7d6416f1f7795ce438eba9ca695ef89d2d2954		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E3 12496 bytes

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