Malicious PDF — malware analysis report

Static analysis result for SHA-256 849e7730ff86e5a1…

MALICIOUS

PDF

39.2 KB Created: 2020-09-02 02:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9830ee2c77478251d0e0b7ba7f68db5d SHA-1: 693ac91c52f09e929ea091a7cad73117d8fa2f01 SHA-256: 849e7730ff86e5a1051f00f5e20248b826b1d3a5b0a190f2fb16f6ecbb33eb20
150 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which is identified as a malicious redirector. The document body, though heavily corrupted, contains text that appears to be a lure for the movie 'Arachnid' in Tamil, directing users to a URL that is part of a link farm. This suggests a phishing or redirection attack aimed at users searching for entertainment 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=arachnid+movie+in+tamil+free
    • https://cdn.shopify.com/s/files/1/0431/6951/3632/files/65834762208.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/10286695592.pdf
    • https://cdn.shopify.com/s/files/1/0429/1801/9235/files/computer_hardware_and_networking_notes_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/4645/1862/files/10974400036.pdf
    • https://static.usrfiles.com/ugd/d78803_e2f94752a10a48a0b6643e2eff2e16f9.pdf
    • https://static.usrfiles.com/ugd/6846fe_8f9b133195e24928a9b2ee76b691c451.pdf
    • https://static.usrfiles.com/ugd/79e5df_b8c8add88b36400e9f95b7d65899c409.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_8a14f129470e4d40a57cdb2a38995d79.pdf
    • https://static.usrfiles.com/ugd/ade4e6_100c2c77bec749a396e32e73dfb82567.pdf
    • https://static.usrfiles.com/ugd/b8c837_24bc800fa5614d73aaeccb19781f70d5.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/duxoxokurolunejatowaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4749/3536/files/fazarafagetoxesolu.pdf
    • https://cdn.shopify.com/s/files/1/0460/1407/0945/files/integumentary_system_study_guide_skin_anatomy.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_off00005a3f.bin
35104f4f6771cbdcf0c9ba5f22a2a61135e58caf3c2050eae62afe962503f20d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3F 5132 bytes
font_01_sfnt_off00006b91.bin
35b903e8ce0e550ced973f301103911fe9098192fc26a4b79c18fb7d7c704f6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B91 10676 bytes

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