Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ecd6843cd95108…

MALICIOUS

PDF

42.4 KB Created: 2020-08-07 10:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 544a0b81a597dff2a45789050760bebc SHA-1: 69b093443fbd9f20d4492233a0dbf484f10d72db SHA-256: d7ecd6843cd95108d7414ffad432e8858bd2d41cce3de2e14b50ac313ff216e1
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a guitar tab PDF. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a further stage.

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=carryon+my+wayward+son+guitar+tab+pdf
    • http://files.kellymacdonaldfitness.com/uploads/1/3/0/8/130814636/3507643.pdf
    • http://files.wagpetresort.com/uploads/1/3/0/9/130969712/e5564d3146d4c3.pdf
    • http://files.thomaschristopherhaag.com/uploads/1/3/1/4/131438111/kewuxobaxomonopujam.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/nefekowofiwuriz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1297022614.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/gefixeruzegojopukokida.pdf
    • https://cdn.shopify.com/s/files/1/0437/2935/4906/files/calendario_orari_f1_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/20371899561.pdf
    • https://cdn.shopify.com/s/files/1/0436/4497/7305/files/antecedentes_historicos_de_la_democracia.pdf
    • https://cdn.shopify.com/s/files/1/0438/2969/0528/files/99650341012.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/71986869874.pdf
    • https://cdn.shopify.com/s/files/1/0431/5545/6164/files/quality_assurance_officer_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9841/files/rirav.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5970/files/80364231954.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/
    • https://cdn.shopify.com/s/files/1/0431/5545/6164/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c21.bin
148228ac881c4d56604b73cae3403700950e230ff52828e930057b13d3cdffe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C21 5568 bytes
font_01_sfnt_off00006f10.bin
6362a012861d988101f19e44fb295c28790ecc43efd49de7d47033741ee2a9d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F10 14616 bytes

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