Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c32dcaa4700f29c…

MALICIOUS

PDF

47.6 KB Created: 2020-08-31 15:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fdc1bfb2e0cf418856f1105589a23ba SHA-1: 1aecc4123540ff499b811ad6f355c2b12f37d9b0 SHA-256: 0c32dcaa4700f29c80dce7137a7506eddb47ca45856a0bf2cb2580bad898c2b8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a mass of external links, including one pointing to a known malicious redirector at `https://ttraff.com/wix?keyword=quiz+guide+persona+5`. The document body, though heavily obfuscated, contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/wix?keyword=quiz+guide+persona+5
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/9980/7126/files/tixonewinomaditul.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/80347274324.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/28816509981.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/puwifutidikif.pdf
    • https://cdn.shopify.com/s/files/1/0430/9739/1261/files/26462206081.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdf
    • https://cdn.shopify.com/s/files/1/0428/1729/0406/files/java_apps_240x320.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/rakidesabug.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0985/files/63777582731.pdf
    • https://static.usrfiles.com/ugd/bb13a2_3d482aa208ee46aaa86f95c1d6b272d0.pdf
    • https://static.usrfiles.com/ugd/625844_9120e0a4f56346708022eaa5f8a5a6f9.pdf
    • https://cdn.shopify.com/s/files/1/0443/6430/0444/files/basic_english_grammar_book_1_teacher_s_resource_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/4888/5662/files/tijovedagivadijabuwa.pdf
    • https://cdn.shopify.com/s/files/1/0447/8540/2013/files/shah_modified_barthel_index.pdf
    • https://cdn.shopify.com/s/files/1/0432/3888/3495/files/66202785246.pdf
    • https://cdn.shopify.com/s/files/1/0429/5943/7975/files/26833393845.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e35.bin
bc3e1c2c98b6f57d0ebfa7db5e961029faccda1dc201b813cc4e5d8417d65fb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E35 5132 bytes
font_01_sfnt_off00007fb4.bin
23982df129c4446a50203f3763309122371c8560a7a0be92ee28a80ba1ad9333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB4 10300 bytes
font_02_sfnt_off0000a2e6.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2E6 4324 bytes

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