Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0f789e2847b4cd…

MALICIOUS

PDF

38.0 KB Created: 2020-08-20 05:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa53d12bf8228d6d61a16249fb53db7e SHA-1: 67922ce68cd82a820180a0bbbe66471aa9729493 SHA-256: bf0f789e2847b4cd42d96cfccebb6b8d1a9c1617eb91ef897c1d16fc49e826d8
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded links, particularly the one to 'ttraff.com', are indicative of a phishing or scam campaign designed to lure users to malicious websites. No scripts were extracted, but the sheer volume of malicious links suggests a broad distribution attempt.

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=baby+abc+rhymes+video+free
    • http://files.fiddlerofstrathspey.co.uk/uploads/1/3/1/3/131398076/1456067.pdf
    • http://files.hypersystems.net/uploads/1/3/0/9/130969334/853355.pdf
    • http://ronik.flourish-fp.com/uploads/1/3/1/4/131483167/kuditujid.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/57421676236.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3448/files/bixby_voice_apk_for_marshmallow.pdf
    • https://cdn.shopify.com/s/files/1/0430/8271/1201/files/10099597660.pdf
    • https://cdn.shopify.com/s/files/1/0431/4683/8167/files/ximikajuzi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5911/8229/files/weximonejomalaxewivu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/tepexo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5887/2998/files/nuklearna_fizika.pdf
    • https://cdn.shopify.com/s/files/1/0433/2657/0664/files/set_a_timer_for_25_minutes.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/fishing_guide_osrs_f2p.pdf
    • https://cdn.shopify.com/s/files/1/0433/6559/7342/files/search_scanned_online.pdf
    • https://cdn.shopify.com/s/files/1/0436/7283/0105/files/robotics_engineering_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0430/9290/2039/files/19991513363.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4585/files/dujupis.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_off000056ca.bin
2df1940fc9fdb8580f8d9981409efa74a3cc7d7892ee32f0c1b2f6e627fee112		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56CA 5580 bytes
font_01_sfnt_off000069a3.bin
e9faaca1890df83d0c8f5b8edd9280598637d523923e0b84888a346b47adde8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69A3 9812 bytes

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