Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ac3d0117f7a469…

MALICIOUS

PDF

45.2 KB Created: 2020-07-30 08:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24fcba24b3831d1e2cfecef076959911 SHA-1: 46b65570ae321340ef7f564b87e1d889dfa6d854 SHA-256: 00ac3d0117f7a469f8a114ddf34671886577f912b41afe32c32c44d7a038ce67
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to funnel victims to further malicious content. The document also exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed for malicious redirection.

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.cc/pify?keyword=strengthening+exercises+for+knee+pdf
    • http://files.affordabletowingnearme.com/uploads/1/3/1/4/131483491/2004edf72.pdf
    • http://files.miriamfields.net/uploads/1/3/1/8/131855992/zusilot_naboxugewosalo.pdf
    • http://files.ewiechart.com/uploads/1/3/2/3/132302913/gomokiwu-dapewijutufose-jofumuvusu.pdf
    • http://files.deanvukelicstonemason.com/uploads/1/3/1/4/131437532/gugafutofit_wezude_lagazi_pumowa.pdf
    • http://files.agsportvideoproduction.com/uploads/1/3/0/8/130813612/zafubomezinux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/doxarazinowosuzisidulu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/xojenuzanegu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1320/0282/files/32562031415.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/wutunuwotodib.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/volenukasodurilikabeme.pdf
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/koketi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8692/0347/files/35758498469.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11383010616.pdf
    • https://cdn.shopify.com/s/files/1/0431/7557/5703/files/96593268519.pdf
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/mubegaxoxuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/78381032660.pdf
    • https://cdn.shopify.com/s/files/1/0432/0536/1821/files/65837333736.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/65850099306.pdf
    • https://cdn.shopify.com/s/files/1/0430/4915/6757/files/16517866165.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8023/files/65906120768.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007550.bin
1bb129923737984a05d77602c49d706d43496aaa1f0657b446a3cef7bdb533da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7550 5200 bytes
font_01_sfnt_off000086f4.bin
f0d54e22d2a0f2cfa12e28a1f777ffc5a4d1b5ef55be3f31ce293f55c2dba57f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86F4 9500 bytes

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