Malicious PDF — malware analysis report

Static analysis result for SHA-256 e749e5435e922fe9…

MALICIOUS

PDF

43.8 KB Created: 2020-08-21 08:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e1b986ded2a3840a28b5b30ac0f820a SHA-1: de57156a4fd36d39d17a1687fdf6f5ac908309d9 SHA-256: e749e5435e922fe9672f96d6722970ea013de2b5a737439dc40b46b58e24c12e
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic identifying it as a PDF SEO link farm. The primary malicious link points to a known redirector. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's not intended for human consumption but rather for automated link distribution. The presence of a malicious redirector URL indicates an attempt to lead users to harmful 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.ru/pify?keyword=aparato+respiratorio+para+ni%25C3%25B1os+pdf
    • http://files.becomingsarh.com/uploads/1/3/0/7/130739567/3400932.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9959/files/indesign_vertical_text.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/5995/files/xizupudipun.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/wujanemitosujijiniwenezi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/best_reader_for_books_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0133/files/96160613568.pdf
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/25430516083.pdf
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/adblock_android_root_xda.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/rinixeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6007/files/giant_bomb_unprofessional_fridays.pdf
    • https://cdn.shopify.com/s/files/1/0430/7622/3129/files/nijafazikoluxekuli.pdf
    • https://cdn.shopify.com/s/files/1/0434/7107/7542/files/dutesegumafoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8837/0072/files/hepatocellular_carcinoma_updated_management_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/equidad_de_genero_concepto.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e6c.bin
a2202f49335eddc0a62205cc269c6ec126ef68c18b0328488f3e949f4ef01105		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6C 4992 bytes
font_01_sfnt_off00006f21.bin
b2dce247f3915007889032545874fea60e72af9f5a73c5d217a87b04005b01be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F21 10732 bytes
font_02_sfnt_off000091db.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91DB 4324 bytes

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