Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c49c86b98265a0c…

MALICIOUS

PDF

62.6 KB Created: 2020-08-12 23:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57a7332f837466462d5cf34cab280a70 SHA-1: e77fac94875499f0cea49780e6289542f49320a6 SHA-256: 5c49c86b98265a0c80cd3be52b69d582454e328bf7b6305f40e20b117e9c7d5f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to Shopify domains, but also includes a critical link to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to the `ttraff.cc` redirector, which likely serves as a gateway to further malicious content or phishing pages.

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/wb?keyword=class%203%20ncert%20english%20book%20pdf%20download
    • http://vunobiz.runcibletheatre.org/uploads/1/3/1/3/131398091/gawujabepi_lovexag.pdf
    • http://files.ethics-based-on-science.com/uploads/1/3/1/4/131453241/5674109.pdf
    • http://files.thewholisticrevolution.com/uploads/1/3/1/6/131606159/wajufebovatomo.pdf
    • http://lomiwom.zannagoldhawk.co.uk/uploads/1/3/1/8/131857334/855a092f202472.pdf
    • http://zivaza.dileoenglish11h.com/uploads/1/3/1/3/131379578/6531905.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0430/7868/0727/files/55175678410.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/aci_318-_11_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5090/1402/files/48849243056.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3567/files/xobesiburulefukipeja.pdf
    • https://cdn.shopify.com/s/files/1/0432/8590/5576/files/xewakenozujelakad.pdf
    • https://cdn.shopify.com/s/files/1/0433/6880/8613/files/94100246320.pdf
    • https://cdn.shopify.com/s/files/1/0436/3167/3504/files/pitobenufomonuwapameli.pdf
    • https://cdn.shopify.com/s/files/1/0434/7609/1045/files/stanford_achievement_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/adobe_photoshop_cs3_tutorials_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8898/6787/files/rabepezox.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3062/files/clinical_hematology_atlas_3rd_edition.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d68.bin
e3589fe3539cc2dd4b8c80e3bafa738e14ff1b6694b2c1f6413c2297652a48ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D68 5780 bytes
font_01_sfnt_off00008103.bin
d30ffe2a909744a5749e2f9c522e302e3c05dac389194459ab66b5bd135a92e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8103 6964 bytes
font_02_sfnt_off000094d6.bin
083d100b8efc1c4f23b8564dd6540454356eb8c517c9e48154b509860102f538		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94D6 10296 bytes
font_03_sfnt_off0000b829.bin
b2b92fcd2919487c650493c91add21b847ed7c13e64e38272e25808cac974a95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB829 17492 bytes
font_04_sfnt_off0000d1b6.bin
cc6a6e9863ea69a4555c2829463e1bd2ac953063813396b7d21556e1948ad345		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B6 7896 bytes

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