Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92d057271b5bdc8…

MALICIOUS

PDF

43.8 KB Created: 2020-08-21 20:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b67b09430de377407681e3f1c23e52d0 SHA-1: 0758da6457147477b906586a09bbfbfb9bc7517a SHA-256: a92d057271b5bdc8943a410b16c1409b75f0f0ead9bfac4fc885c20bf9469c5a
128 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.ru/pify?keyword=e2+visa+application+form+for+south+korea'. This URL is presented within the document body as a lure for a 'visa application form'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=e2+visa+application+form+for+south+korea
    • http://files.newhopelighthouseradio.org/uploads/1/3/1/6/131606690/zepiboguxoluxadikem.pdf
    • https://cdn.shopify.com/s/files/1/0431/5653/7505/files/36843157335.pdf
    • https://cdn.shopify.com/s/files/1/0441/1867/1512/files/alto_sax_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9957/files/definicion_de_analisis_financiero.pdf
    • https://cdn.shopify.com/s/files/1/0431/0630/4153/files/logistic_regression_spss_interpretation.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5737/files/21448178147.pdf
    • https://cdn.shopify.com/s/files/1/0434/7595/9973/files/35979001023.pdf
    • https://cdn.shopify.com/s/files/1/0434/3237/8517/files/povesaxex.pdf
    • https://cdn.shopify.com/s/files/1/0429/3243/7158/files/zufopifigufabev.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/nuranusopemifeke.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8852/files/samotal.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c67.bin
df005bca2dc2af64faa8268ea36cd2bcca8b9ecb4751d48c17b96b3a96fd9a3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C67 5468 bytes
font_01_sfnt_off00007ed1.bin
fa7bf3ea5cf5c752f147ffd1e57f49943eba77a61201d1ecfbe20de5a1d3d506		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED1 10352 bytes

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