Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3c808658194d04…

MALICIOUS

PDF

44.8 KB Created: 2020-10-17 05:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e8338a13bfbc62681bab4eb3b5031328 SHA-1: fad387b291789899b870cca6b288a166e12a3e8e SHA-256: bc3c808658194d04e4c0ae340ccc85b663a6da0db4e63b5b2a292d8ef21ae2e3
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/123?keyword=join+pdf+pages+online'. The document body also contains this URL, suggesting a social engineering lure to trick users into visiting a potentially malicious site. The ML classifier also strongly indicated maliciousness.

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/123?keyword=join+pdf+pages+online In PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/nopopi.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/c372e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371514/normal_5f8a0cac23a59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f89444ecf527.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8c4ede23-2947-4d2b-a158-90fb029dc70e/benaketiwuwefiponux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57ff10c7-f5b4-4afd-b276-3139fc8d3015/puzixutimemuloboduzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a03746e5-ff9c-46fc-a511-944258f87b5c/84288839976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a57cb054-599b-4fd0-a6cf-e6745970811d/42505174405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb175a98-9194-46ab-b11f-4ab3029d8b40/wamip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5700/7770/files/i_stand_in_awe_of_you_lyrics_jesus_culture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9059c363-4388-483d-a207-d64ec33d6a06/97296866595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e1913b-0de8-4586-930c-1f112c39f45f/fubuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0039/2603/files/joox_music_premium_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5544/8213/files/vodofatorabemipowow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2585/7181/files/jubejogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0159/3256/files/lidaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5217/8849/files/84568167049.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EA 4812 bytes
SHA-256: bd5bb866f979646ee6bb58125a71a86d43260f8a6bd4c1cb57c6e44ec4b26e4b
font_01_sfnt_off00007551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7551 10192 bytes
SHA-256: ff6ee623ce416ef67737bdec683731d965412caedd0dfc761d1be41153b87138
font_02_sfnt_off00009830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9830 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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