Malicious PDF — malware analysis report

Static analysis result for SHA-256 4abe30f012c7b1a0…

MALICIOUS

PDF

74.4 KB Created: 2020-08-24 02:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae280a46809f3f567b609de17fd384da SHA-1: a711dda8f9371a2caba27dac76d6f78dedcd26a9 SHA-256: 4abe30f012c7b1a092702d95e767d16f3cc08ff6f0da98a0a68e7bfc2aa89f8f
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=apasl+hbv+guidelines+2017'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body contains the malicious URL and several benign-looking Shopify URLs, suggesting a lure to a malicious site.

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.ru/pify?keyword=apasl+hbv+guidelines+2017
    • http://golex.glendowiecommunitycentre.org.nz/uploads/1/3/1/8/131856380/nular.pdf
    • http://lilomi.pbjshowhorses.com/uploads/1/3/1/3/131383483/doziku-metelon-sijiwa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/pesiwelegazuminikifibo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9656/4131/files/46245868849.pdf
    • https://cdn.shopify.com/s/files/1/0435/2373/5720/files/88206383858.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/javorumaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7881/9735/files/fap_titans_rebirth.pdf
    • https://cdn.shopify.com/s/files/1/0431/4500/3169/files/bescherelle_anglais_les_exercices.pdf
    • https://cdn.shopify.com/s/files/1/0437/6847/9893/files/lamebisixu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6509/5845/files/wexavigajasufafuvimikuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/bright_tomorrows_app.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/71092750700.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d040.bin
70a3d7b9af8dd97c3f2da9388c222f27a1cf8097672fb96ab615edbc50254336		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD040 5720 bytes
font_01_sfnt_off0000e3b7.bin
d222ebe8f037b7b8a44f62e50c1dc20495cae60ad512f0a46c8695f5cceff721		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B7 10480 bytes
font_02_sfnt_off000107c7.bin
4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107C7 16060 bytes

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