Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c26ddc70e21bfd…

MALICIOUS

PDF

53.9 KB Created: 2020-08-09 03:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b2c8961c62904f92875d6b421af0a33 SHA-1: 54cd3d56b464dd25bc234db97515b0ab6fac3fcb SHA-256: 31c26ddc70e21bfd9bec5a8454df2bd2599c5fe4423eea8ae0c517ea4d664111
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=assembler+tutorial+deutsch+pdf`. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The PDF also contains a mass external PDF link farm, with many links pointing to `cdn.shopify.com` and other domains, suggesting a broader campaign to distribute malicious content. 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/pify?keyword=assembler+tutorial+deutsch+pdf
    • http://files.sherylkaz.com/uploads/1/3/2/6/132682929/rajozepofuvo.pdf
    • http://kufanexaz.addisonwilhite.com/uploads/1/3/0/8/130874253/raroxozimatu.pdf
    • http://files.hollywaightdesigns.com/uploads/1/3/1/4/131407102/2689650.pdf
    • http://files.motivationalmowing.com/uploads/1/3/0/9/130969851/wodinisepopada.pdf
    • http://files.minimalistboutiqueskincare.com/uploads/1/3/1/3/131383959/xexanam_nanawito_xuzejogetexe_gebekoboxufa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/xugofosikapivow.pdf
    • https://cdn.shopify.com/s/files/1/0433/8699/4855/files/rmv-_1_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8411/files/11704730315.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9574/files/red_text_discord.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/59622264108.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3288/files/nuzoz.pdf
    • https://cdn.shopify.com/s/files/1/0438/4253/5589/files/livros_sobre_pesquisa_bibliogrfica.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3232/files/fusionner_2_pages.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/pekiperafatiwowod.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_off00008d0c.bin
af55c09d933243a0d994e149c7c1f797c6ccc730d59669d1c184133e6cfd96c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0C 5524 bytes
font_01_sfnt_off00009fa3.bin
e548df5e5d9b7b1d80c3d1aae61457e1677eca2c5e9a8888ded76ff15d8eae1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FA3 13584 bytes

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