Malicious PDF — malware analysis report

Static analysis result for SHA-256 77e6ff2e7ccf0625…

MALICIOUS

PDF

56.9 KB Created: 2020-07-26 17:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e3923a0ce5fb60788bda0542c862eb6 SHA-1: aeda2fb5fd3192f51db30aa640d67898850cb218 SHA-256: 77e6ff2e7ccf0625c719dec4a585bc1219cf7e49b9983994bfedc9508dead6d9
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains text related to 'simultaneous equations worksheet with answers', aligning with the lure presented by the malicious URL. The primary attack vector appears to be directing users to a malicious site via a link disguised as educational content.

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.com/pify?keyword=simultaneous+equations+worksheet+with+answers
    • http://files.andrewpoppleton.com/uploads/1/3/1/6/131606803/3685673.pdf
    • http://files.hashimakib.co.uk/uploads/1/3/0/9/130969645/zovubifokulos-tolufutefi-fifis.pdf
    • http://files.deafwomenofohio.org/uploads/1/3/2/6/132695730/bipilukobafa-rezaruraselivax-xopulupunufuma-xomaw.pdf
    • http://files.roothousemuseum.com/uploads/1/3/0/7/130739850/75fa388cf3d3028.pdf
    • http://files.sheiladavis.ca/uploads/1/3/1/4/131452783/nopudokuv_pejarerawaxeje_kojeg.pdf
    • http://files.hashimakib.co.uk/uploads/1/3/0/9/130969645/zovubifokulos-tol
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/bivabavegedowajolubepo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/26801663930.pdf
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/38145819138.pdf
    • https://cdn.shopify.com/s/files/1/0437/0631/9001/files/84835098530.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/zupuparinozatidus.pdf
    • https://cdn.shopify.com/s/files/1/0436/0300/1502/files/demaxofivefitoliku.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6679/files/piwekuwekixerunokik.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0071/files/99842492180.pdf
    • https://cdn.shopify.com/s/files/1/0439/9408/7582/files/suvemozewazij.pdf
    • https://cdn.shopify.com/s/files/1/0433/3358/2998/files/tejiralunufibetodusiga.pdf
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/17632915998.pdf
    • https://cdn.shopify.com/s/files/1/0435/2940/4567/files/pajuzosurutoxokep.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_off000096d6.bin
0881b2d742f238810aef69653d23a8fd432a1931f11c2c8d2905adcacc571fa2
pdf-font-stream PDF embedded font (sfnt) at offset 0x96D6 5192 bytes
font_01_sfnt_off0000a857.bin
c74724116fcc2232e3b2fefc043e4b4e55d063c93c153d454115b8fa35969875
pdf-font-stream PDF embedded font (sfnt) at offset 0xA857 14804 bytes