Malicious PDF — malware analysis report

Static analysis result for SHA-256 bca134cc3f950c11…

MALICIOUS

PDF

43.7 KB Created: 2020-08-15 00:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 959b7e5a121a820def0f85039b327904 SHA-1: 256dfe9ca26bbb7efe7780d3186d2ae3e51108ff SHA-256: bca134cc3f950c11e6ac8d719e66783aa6cfe2e131cd50a4ed5c00a26ad8f3a6
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm. One of the primary links directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same suspicious URL, suggesting an attempt to lure users to malicious content through a deceptive document.

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=acca+sbr+examiner+report+december+2018
    • http://files.lislhdbooks.com/uploads/1/3/0/7/130776245/tutatevifijatevija.pdf
    • http://files.aquinasmaths.com/uploads/1/3/1/6/131637658/2235093.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3041/files/muxasejefapibaviguwa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0639/3496/files/tumokijejuxudonanobifij.pdf
    • https://cdn.shopify.com/s/files/1/0445/4694/9279/files/perfect_modal_verbs_explanation.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0839/files/24384049400.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6564/files/67722552038.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6710/files/gedobokerirumitano.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0437/files/adobe_reader_gratis_bagas31.pdf
    • https://cdn.shopify.com/s/files/1/0440/8921/3093/files/38757736990.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23083433767.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/28488806921.pdf
    • https://cdn.shopify.com/s/files/1/0429/5353/9747/files/vulvovaginitis_por_candida_albicans.pdf
    • https://cdn.shopify.com/s/files/1/0434/8297/2326/files/fufubarapavirele.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6491/files/xelabilezelunesijupomojoj.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_off00006b7d.bin
2b2e885c0ebb3534046a0c8b6b86de1d6c449ac39f5b7a8a897ac3e110ce47a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7D 5904 bytes
font_01_sfnt_off00007f7a.bin
a96f8f14ababde7601485a954bf6cf9c8f6351d14fe4f1c29d2892d825dd11b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7A 10168 bytes

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