Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c398aa2f261d62…

MALICIOUS

PDF

40.2 KB Created: 2020-08-22 21:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4897f61808bfc1d079f1d014e80997f3 SHA-1: 4cb8cd4810f494588a5f9ca5484ec92889d86454 SHA-256: d7c398aa2f261d6266cd628c7c7724afd835f0811733b3997619b7e03968e9e5
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to benign Shopify domains, but one critical heuristic identified a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=manualidades+con+reciclaje+para+dia+de+muertos, which is flagged as malicious. This suggests the document's primary purpose is to lure users to a malicious site.

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=manualidades+con+reciclaje+para+dia+de+muertos
    • http://komojuzeb.ancientcitycustoms.com/uploads/1/3/2/8/132814930/3222289.pdf
    • http://zegitoba.fit4fun13.com/uploads/1/3/0/7/130775934/6725829.pdf
    • http://files.happyvalleyimprov.com/uploads/1/3/1/4/131407493/gijelut.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5091/files/best_to_autocad_converter_online.pdf
    • https://cdn.shopify.com/s/files/1/0460/5670/2107/files/best_live_tv_apk_for_firestick.pdf
    • https://cdn.shopify.com/s/files/1/0430/8746/2551/files/volivuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/79497711844.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6682/files/gimarefubitakedevemoguju.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/totupap.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/home_page_template_html.pdf
    • https://cdn.shopify.com/s/files/1/0432/9570/3204/files/team_win_recovery_project_galaxy_s3.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/ramanepeguvonibaxixed.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/29229853290.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/xexemuxobajekinodote.pdf
    • https://cdn.shopify.com/s/files/1/0433/0648/3876/files/arizona_ccw_permit_renewal_form.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_off00005bf9.bin
2110f7ed66de9d261067be0be57e7d102b5636081c49cbfa055b8238aaf45233		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF9 5300 bytes
font_01_sfnt_off00006de7.bin
8d22dcbfbdbc6db11cd531212ef59a62ed8d590a622d7c0326f63f023d8d15a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE7 11128 bytes

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