Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e3103c0db1de82…

MALICIOUS

PDF

34.4 KB Created: 2020-08-27 20:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bc304513c200008f1acfab5fa000e33 SHA-1: e8c7564cda0e91293aafd9165ddc55d7fb21983b SHA-256: a1e3103c0db1de829077c0a438fb85680c5822216c544ebc75aea8b841d8c606
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 specifically identifying it as a PDF link farm. The primary malicious URL, https://ttraff.ru/pify?keyword=ni%25C3%25B1a+que+nacio+limpia+de+pecado+letr, is flagged as a malicious redirector. While many other links point to benign Shopify URLs, the presence of the malicious redirector and the sheer volume of links suggest an attempt to manipulate search engine results or distribute further malicious 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=ni%25C3%25B1a+que+nacio+limpia+de+pecado+letr
    • http://midage.lymeregisu3a.org/uploads/1/3/2/7/132741508/lizisaforefeloku.pdf
    • http://jamaj.theopenbus.com/uploads/1/3/2/6/132683138/vamusedejagi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9621/0594/files/rolulabemowagoniwifiweg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdf
    • https://cdn.shopify.com/s/files/1/0440/1371/5606/files/41632364394.pdf
    • https://cdn.shopify.com/s/files/1/0461/8348/1507/files/corresponding_and_alternate_angles_worksheet_tes.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/saworaboxomunipugemu.pdf
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/sample_personal_statement_for_job_application.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/30632711141.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4664/files/techniques_of_data_analysis_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/textbook_of_medical_oncology.pdf
    • https://cdn.shopify.com/s/files/1/0432/5533/3027/files/22005609345.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_off0000457b.bin
04ca6ccb8ceb8fb3e0b06a0f25b178f77f5886fd5ce76570b81e854e11a496cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x457B 5348 bytes
font_01_sfnt_off00005744.bin
5a11dfc1290904d1172ce72f5040edd6ec67d812ee4ecfb1a9725801c1ed3fc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5744 11068 bytes

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