Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0940a504bfeeef1…

MALICIOUS

PDF

42.0 KB Created: 2020-08-13 07:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 787cdcbddd2081542824d3a9225c6315 SHA-1: 253295252202d68e31ab73f6097345092f0a6573 SHA-256: b0940a504bfeeef18825be71a863075805bc352ccede0dc68c60626f2fb75804
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used in SEO link farms to manipulate search engine rankings or distribute malicious content. One critical heuristic identified a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting the document's primary purpose is to drive traffic to this malicious site. No scripts were extracted from this sample.

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/wb?keyword=learning%20styles%20in%20the%20esl%20efl%20classroom%20joy%20reid%20pdf
    • http://gobunid.westashdesigns.com/uploads/1/3/0/7/130775734/vevefavesopilo.pdf
    • http://files.redwhiteandbigley.com/uploads/1/3/1/0/131070611/7391f6a7eb989.pdf
    • http://wonitix.tremont2go.com/uploads/1/3/1/8/131871980/9467790.pdf
    • http://files.purpleinkpublishing.com/uploads/1/3/1/4/131437844/mikofoxaxomojope.pdf
    • https://cdn.shopify.com/s/files/1/0433/3617/1688/files/calendario_2020_com_luas.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/nosafopagaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/72358011313.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/72900260256.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/36373289701.pdf
    • https://cdn.shopify.com/s/files/1/0436/8649/4361/files/38818245065.pdf
    • https://cdn.shopify.com/s/files/1/0440/4301/0198/files/79592144876.pdf
    • https://cdn.shopify.com/s/files/1/0448/8983/3639/files/80337368092.pdf
    • https://cdn.shopify.com/s/files/1/0433/6438/4927/files/33138993075.pdf
    • https://cdn.shopify.com/s/files/1/0440/1568/1701/files/annexure_e1_for_hssc_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8059/8172/files/kenik.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_off000064aa.bin
30b9de2f77313101e12ef719b8b3b20ff1fe15a4e52fd2ef102e1cfb5f818a11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64AA 5688 bytes
font_01_sfnt_off000077d8.bin
0a1a34e29b0c6fa0080c4e61e990044168f1265dee65f77c62406e64cb4ff45b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D8 10144 bytes

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