Malicious PDF — malware analysis report

Static analysis result for SHA-256 df026e4741947c39…

MALICIOUS

PDF

55.7 KB Created: 2020-08-25 04:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92ce5df89e20f3654647d75aa2a4b0a2 SHA-1: 3f5840b10a08faa8841bd400744098308d36100b SHA-256: df026e4741947c39f3aec5f62641c431060eb142cdfa4a13e0467296ded6c8b9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link farm designed to lure users to malicious infrastructure, specifically `https://ttraff.ru/pify?keyword=sindrome+anemico+en+ni%25C3%25B1os+pdf`. The document body itself is heavily obfuscated but contains embedded URLs, including the primary malicious redirector and numerous benign-looking Shopify links, likely for SEO manipulation. The presence of a malicious redirector link strongly suggests a phishing or malware distribution attempt.

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=sindrome+anemico+en+ni%25C3%25B1os+pdf
    • http://files.derrettphoto.com/uploads/1/3/2/6/132695325/nekege.pdf
    • https://cdn.shopify.com/s/files/1/0438/5262/8118/files/understanding_psychology_chapter_7_assessment_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/4438/7481/files/autosomal_dominant_traits.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9137/files/85708235851.pdf
    • https://cdn.shopify.com/s/files/1/0461/4068/6489/files/21789712371.pdf
    • https://cdn.shopify.com/s/files/1/0436/7699/1653/files/sakugonaxumogonavaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7445/files/zujokizasenuguduxekevib.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/calculations_in_excel_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/8986/3580/files/reraxuwoma.pdf
    • https://cdn.shopify.com/s/files/1/0429/7195/5353/files/us_federal_reserve_balance_sheet_unwind.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_off000099de.bin
0eaf180264129e16b03eec73a81ce1ecd652e04903c391ddfc95d11ad48d1305		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99DE 5584 bytes
font_01_sfnt_off0000ac74.bin
8f2a3fa0b965eafdfc8bb2d7fff8e04d4416e4a79f77b0041ed46d6b88afec06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC74 11000 bytes

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