Malicious PDF — malware analysis report

Static analysis result for SHA-256 f028134a713b2a58…

MALICIOUS

PDF

43.3 KB Created: 2020-08-23 15:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b79ad604cc0b94e1cda1ebbb76ff8d2 SHA-1: cf8168ce3154b8d7596f74a9f37757569c01ac61 SHA-256: f028134a713b2a586ebe257d6e9711ee425b7f04e73f73f1b8d778599e24269b
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to a URL designed to lure users with academic search terms. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which are hosted on potentially suspicious domains. No scripts were extracted from this sample, but the embedded URLs and the link farm nature strongly suggest a phishing or redirection attack.

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=holes+anatomy+and+physiology+lab+book+answers
    • http://noregor.motscatering.com/uploads/1/3/0/7/130776688/widudigu_kaxojodorixokav_lisififi_sebamigojux.pdf
    • http://xarivugiw.brcofoundation.org/uploads/1/3/0/7/130739385/kakijuvowa.pdf
    • http://files.carolvoss.com/uploads/1/3/0/7/130738484/keken.pdf
    • http://wakexoro.hipababy.com/uploads/1/3/2/8/132815176/55cff1.pdf
    • http://zadav.rmarckantrowitz.com/uploads/1/3/1/4/131407535/6814046.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/86402486275.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/jomiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/nojek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20931566490.pdf
    • https://cdn.shopify.com/s/files/1/0437/9341/6349/files/avery_template_8160_specs.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3888/files/82296405708.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/lilegamebuxatulexawasopu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9541/6213/files/cellucor_alpha_amino_performance_bcaa_powder.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_off00006732.bin
ec7eb6b8397fa6ae1aa78605411ee74094447daa7ac55ef671d3d0e8265071ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6732 5732 bytes
font_01_sfnt_off00007a93.bin
5db25b679b1da6367fc38f11547e1190d2a5a81d948d6db7a253c91996b3895c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A93 10396 bytes

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