Malicious PDF — malware analysis report

Static analysis result for SHA-256 453943c7fd99bb77…

MALICIOUS

PDF

43.8 KB Created: 2020-08-23 03:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e38c8fa9b12b81078b90b1d680a4310 SHA-1: 1cbece1eada815f425b9bcb721c5c9349a368c4f SHA-256: 453943c7fd99bb7742e88a2de51eca74c10d3ab7df67f11ac854ae1e17fd09ef
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with the primary link directing to a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.com/pify?keyword=refraction+of+light+ncert+pdf as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to malicious content under the guise of a benign topic like 'refraction of light'. No scripts were extracted, and the file type is PDF, indicating a likely phishing or redirection attack.

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=refraction+of+light+ncert+pdf
    • http://fokarewas.ledgewoodhills.net/uploads/1/3/1/4/131411150/fuxis_wosuvefunux.pdf
    • http://files.irishblessingscoffeehouse.com/uploads/1/3/1/4/131407315/d88c95b500523dd.pdf
    • http://files.isaksonchiropractic.com/uploads/1/3/1/3/131398195/6582099.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2951/files/58050032928.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8241/files/chucky_full_movie_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/rotibepej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2033782386.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/nirvana_heart_shaped_box_tab.pdf
    • https://cdn.shopify.com/s/files/1/0433/6641/6549/files/11635267466.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2623/files/causes_of_drug_abuse_essay.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2536/files/miller_analogy_test.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/twitter_followers_app_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059a2.bin
3ae91c95408feea119dd0213caa403e11ec498751e722008d6df4e6bb4581041		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A2 5244 bytes
font_01_sfnt_off00006b6b.bin
e09c896fef2767703d0d5e824f8f3cc86f207981ce3a1a2a6dd81ef3bbe30cf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6B 9884 bytes
font_02_sfnt_off00008d72.bin
20d7306972e5f804acc0082a46629f259f60cfdea2a9d02db4b080df13e7536c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D72 16144 bytes

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