Malicious PDF — malware analysis report

Static analysis result for SHA-256 036ae29f7b26d874…

MALICIOUS

PDF

116.6 KB Created: 2020-08-09 07:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90931636f1d3a32f2a834f7fc1b9dbb9 SHA-1: 07e76e39dd92ce70f604404bc342e773e84b0b0c SHA-256: 036ae29f7b26d8746312e9261a169b129dbc1f61a789cf661383e72055302161
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=zhuyin+chart+pdf', suggesting a phishing or redirection attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/pify?keyword=zhuyin+chart+pdf
    • http://ledefoto.thelevelupnetwork.com/uploads/1/3/2/8/132814930/883739.pdf
    • http://vavikolog.communicationculturehealth.org/uploads/1/3/0/9/130969352/8fd9211d665e.pdf
    • http://nubuvokaf.garycordingley.co.uk/uploads/1/3/0/9/130969742/bezibagusewit.pdf
    • http://fakosusos.nlascouting.org/uploads/1/3/1/4/131437987/mokoj_xopaveduxa_kogabewodofu.pdf
    • http://sowepufa.newtotowncollective.com/uploads/1/3/1/4/131482975/5692349.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/vorobilopulobobive.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/xiwozo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/dinexafemiboserikupiwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2282/8198/files/67016601116.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/zikabetukep.pdf
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/33687287432.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/8143834476.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0514/files/pmdg_777_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/1943/6185/files/32433913300.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/zulezijoxubapinidesogi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/82808892631.pdf
    • https://cdn.shopify.com/s/files/1/0434/2326/9014/files/xotigofe.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d074.bin
0f63cd547fae9ae049a30947f56bb7b9396001210825a7cc0b5ec08c2887da93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD074 46296 bytes
font_01_sfnt_off00015e25.bin
381eb20342ee02a5d92a7c420c6726e6b11db55d6495a6dfb1ff10eee65fc454		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E25 5092 bytes
font_02_sfnt_off00016f83.bin
8fa3852c6f2f7c66ce9d2d37c6dd19751799b4b7e067b04f2ca4b31257452dcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16F83 22568 bytes
font_03_sfnt_off0001afaa.bin
757edbe9ca696dc752e8794cc2fab55b744a24b197aba41abea0c8f583a0f3ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFAA 16116 bytes

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