Malicious PDF — malware analysis report

Static analysis result for SHA-256 45d2e10e37e5ec8d…

MALICIOUS

PDF

138.0 KB Created: 2020-07-25 17:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 550935cfb61bec95053367614d7ab077 SHA-1: a08879f2abf1cc822b6cafd29809df49d3c3c540 SHA-256: 45d2e10e37e5ec8ddae76fde3c8afed0d918d7e84f2769a75791a68e8b5ba0b0
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain keywords related to medical guidelines, likely intended to trick users into clicking the malicious links. The primary malicious IOC is the redirector URL.

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=esophageal+cancer+treatment+guidelines+nccn
    • http://files.salsaandtea.com/uploads/1/3/1/6/131607363/c2ca0b2770b.pdf
    • http://files.dashandrizzle.com/uploads/1/3/0/7/130739146/d41bd7a327.pdf
    • http://files.whiteoakumc.org/uploads/1/3/0/8/130873781/xoluluxetuv.pdf
    • http://files.nariatlantablog.org/uploads/1/3/0/8/130814110/6600358.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/palubopasigu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5835/6639/files/mujupereduzomaduluxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8978/8069/files/jikesavifunak.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/fotukobasisefoxuxapeparep.pdf
    • https://cdn.shopify.com/s/files/1/0430/7818/9205/files/femavenefirugemilenupa.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/65106450838.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/ronir.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/48751455120.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/dosozokumokogijiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4093/9933/files/84915341337.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/40474614744.pdf
    • https://cdn.shopify.com/s/files/1/0437/3407/3505/files/delogatepivezomogegawarur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puwojadudabub.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_off0001e333.bin
b4076cdf1990becf9f7f6222abfa07525ffea7bf0fa05f9b7e7980d53e30816a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E333 5324 bytes
font_01_sfnt_off0001f51b.bin
cab8dace69f76c676632abbe3a0035b73b2d2c0c2a332cc60461ef2b1507514d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F51B 10868 bytes

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