Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a21b816d20d0df8…

MALICIOUS

PDF

46.6 KB Created: 2020-08-31 08:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2580168c68d683d14d6e5578505cbc2 SHA-1: 29635030281402d93d2e2e55054f2be56ebec38d SHA-256: 0a21b816d20d0df819e464c7674dab9ceb078d3ff8dfc354636bf8edb153bd59
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting an attempt to lead the user to harmful content. The document body, though heavily obfuscated, contains the same URL and references a movie album download, indicating a social engineering lure. The presence of numerous external PDF links further supports a link farm or redirection strategy.

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.ru/wix?keyword=pitch+perfect+2+album+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/d99ef3_229ac08927a947b5b6483b4505d1692f.pdf
    • https://static.usrfiles.com/ugd/067ecb_bdbd1a64d0d04db3a2ba5df253087d99.pdf
    • https://static.usrfiles.com/ugd/76156b_4d6c2f1505c944f29d53547388c3dbc5.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f776df66d0d40f7ade6c47fe730638f.pdf
    • https://static.usrfiles.com/ugd/1be480_fff54b6eed80429380a6526ec7f3594f.pdf
    • https://static.usrfiles.com/ugd/b27199_2648a63ecd594875a9070c214d355a83.pdf
    • https://static.usrfiles.com/ugd/06497e_792e578e2fa84a8a8c4dd7075c5307b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_00bf8eff50b941c4b385b2c08490581c.pdf
    • https://static.usrfiles.com/ugd/b7ed05_0f984946d7cf428bbfaded75a255652d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad78fa24dd2d46dcaa99271bdc585643.pdf
    • https://static.usrfiles.com/ugd/7c3584_83baaa4dca4c419595b38ba7f0998c4b.pdf
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/18218208967.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/8473600249.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/lagu_barat_123_net.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/zenonononuba.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_off0000679f.bin
b5d82e0353288a1a02fe14f6c63ca1e56ead1381a660a80fd46473570ae49ced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x679F 5464 bytes
font_01_sfnt_off00007a0e.bin
9f5cfd093131722d0089d8728c6a10364733f91c80339a025f9d61a3ca38a637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0E 11556 bytes
font_02_sfnt_off00009efb.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EFB 4324 bytes

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