Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3df97090ce3d532…

MALICIOUS

PDF

45.9 KB Created: 2020-08-19 18:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af7ba13117536d91c4de8c91f2b1d3ea SHA-1: f7c567508b6019e94ed95ce67e61078d1ecc6447 SHA-256: e3df97090ce3d5322a4801373406ef9333ad33679c525fe8a5da4509152423ca
150 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to 'Asiana airlines uniform' and the redirector URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=asiana+airlines+uniform
    • http://files.actacoustics.co.uk/uploads/1/3/1/1/131163788/nitogozemux.pdf
    • http://gebodekeb.shimmerandspice.com/uploads/1/3/1/4/131482995/kisojim-pafifidofugok-doganupiwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/66805366039.pdf
    • https://cdn.shopify.com/s/files/1/0435/0155/1771/files/77187195148.pdf
    • https://cdn.shopify.com/s/files/1/0430/3929/3593/files/thinking_in_java_bruce_eckel.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/39449804551.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/calculus_with_differential_equations_9th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/kimusiwibezorofel.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2944/files/10581592462.pdf
    • https://cdn.shopify.com/s/files/1/0434/0488/6166/files/33649310055.pdf
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/mubojete.pdf
    • https://cdn.shopify.com/s/files/1/0439/0774/3899/files/piwix.pdf
    • https://cdn.shopify.com/s/files/1/0448/4294/2624/files/balloon_text_font.pdf
    • https://cdn.shopify.com/s/files/1/0438/5836/2518/files/62646189281.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_off000077d5.bin
ccb2007d942f4958084e81d3e2dd5f023dc071c8d4d1051a0755d242a5e0b8d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D5 4904 bytes
font_01_sfnt_off00008860.bin
ab56bf9ea557bab61383095093a6902853de9c62fb0a1455a2ecdadc6246a38c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8860 10296 bytes

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