Malicious PDF — malware analysis report

Static analysis result for SHA-256 1454ea2a6e5f118a…

MALICIOUS

PDF

41.7 KB Created: 2020-08-03 00:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2f20db7dbab783650d5b328cc04d6cb SHA-1: 277aaa18a16c5f9a7d6faa5ad4bafefddb2950ef SHA-256: 1454ea2a6e5f118adbac8db701ca54a4506d93471b7c15a65fc0aada8c884f08
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. This suggests an attempt to manipulate search engine results or to lead users to malicious content. 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.cc/pify?keyword=geo+trax+grand+central+station
    • http://files.grandaveplaza.com/uploads/1/3/1/4/131453255/fopukidiziso-dedixuzuxapot-moretej-tutivulepobar.pdf
    • http://files.justbeingkaileyjo.com/uploads/1/3/1/4/131437379/5423849.pdf
    • http://files.mountainairdance.com/uploads/1/3/1/3/131382078/fe694ad8.pdf
    • http://files.counselingwithcatherine.com/uploads/1/3/0/7/130776483/84d4cd44e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/5555379131.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9383/files/wexasomitapibilifo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8115/2152/files/mitsubishi_fuso_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1974/files/wubulapuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/78035215437.pdf
    • https://cdn.shopify.com/s/files/1/0436/2282/6142/files/moded.pdf
    • https://cdn.shopify.com/s/files/1/0428/9999/6839/files/50499716071.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/xiriduwizejajozuveritiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/9007/4005/files/chandelier_piano_chord.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7086/files/bukutozuxenumudav.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_off00005705.bin
f1c811fe1b8c1135faf70730a32d11f705c5926f33e2f985554f0f908d53cef5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5705 4996 bytes
font_01_sfnt_off00006810.bin
54bd1e9f0ea1b7476028e9a7372210640a4158450037e01e91d3e6b758ec9847		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6810 10388 bytes
font_02_sfnt_off00008b99.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B99 4324 bytes

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