Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd6edc272681352…

MALICIOUS

PDF

56.7 KB Created: 2020-08-10 04:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 971b65210cac9ccb402426637b4401fa SHA-1: 8075e5b334c095a079f500670c50482629451d05 SHA-256: 1bd6edc272681352d8f90f20199214f53130a5b98ee252201068c545ddb773b8
150 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to a known malicious redirector, and another critical heuristic for being a link farm. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and a URL that points to a malicious redirector, suggesting the primary purpose is to lure users to malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=behave+sapolsky+pdf
    • http://files.lotteryindustryhalloffame.com/uploads/1/3/2/7/132740845/98afd7.pdf
    • http://files.rivkiebaum.com/uploads/1/3/0/7/130739318/jaxivi-dokumefisexumu-pujurefiju-tuziva.pdf
    • http://files.terrymurphywrites.com/uploads/1/3/1/6/131636719/1065891.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/83161526497.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0554/files/bokexadujetupen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43106273748.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3784/files/mesojekuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1703/files/bus_eireann_120_timetable.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wizivudid.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/zifomojomejebigobemisebux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89462818099.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/raxaxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7595/1005/files/scert_up_btc_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/95333011156.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_off0000a084.bin
af806189d494d798d5d82b583fc922309a536f6cff2e5423e71fedc50c374abc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA084 5308 bytes
font_01_sfnt_off0000b2a7.bin
ced7e8ba61ef4fd7614dfabdc148b9eaf73b90385c77c495ed1e0e5db71c92ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A7 10352 bytes

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