Malicious PDF — malware analysis report

Static analysis result for SHA-256 01095371cff7f79a…

MALICIOUS

PDF

35.7 KB Created: 2020-08-30 22:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fb411ba8f84a0ae6b3bfa258605d137 SHA-1: 35cadbefa9761ff2ca210276e4ec05c087bc29df SHA-256: 01095371cff7f79a22de607ad3177ad4d6f25b1ee03a4adf0ad2fff7fed2ed35
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=kahaani+izle+t%25C3%25BCrk%25C3%25A7e+altyaz%25C4%25B1l%25C4%25B1'. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. These elements suggest the primary goal is to redirect the user to a malicious site.

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/wix?keyword=kahaani+izle+t%25C3%25BCrk%25C3%25A7e+altyaz%25C4%25B1l%25C4%25B1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/asmedia_usb3._1_driver.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/newesadusubetov.pdf
    • https://cdn.shopify.com/s/files/1/0447/9467/5357/files/artritis_reumatoide_gpc.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/dexikegel.pdf
    • https://cdn.shopify.com/s/files/1/0441/1988/3928/files/bassoon_concerto_mozart.pdf
    • https://cdn.shopify.com/s/files/1/0434/4777/9478/files/26484851854.pdf
    • https://cdn.shopify.com/s/files/1/0431/0908/9447/files/70497911582.pdf
    • https://cdn.shopify.com/s/files/1/0433/7880/2846/files/kaxofusati.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/66367128376.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/22577955975.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/torajadapafawomaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/2380/9187/files/total_annihilation_maps.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_off00004bca.bin
e9e34a2c3befb242d33fee944a19c27274611e8e004ea265a22fe94a471792bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BCA 5116 bytes
font_01_sfnt_off00005cfc.bin
ff8999ffd89ffefec75cd102b6db35995e61ee741eb0e03ada036c305033f376
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFC 11272 bytes