Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4a7c7f261737b0…

MALICIOUS

PDF

50.0 KB Created: 2020-08-08 07:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e1d4d74d59653405d3f920f33d7c8f6 SHA-1: d9f531a3819996840738d2667f85038fe1dd5793 SHA-256: be4a7c7f261737b0744767e0cbc97659d26d391337c29f24982f2fc597511479
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files. The primary malicious URL identified is https://ttraff.ru/pify?keyword=alcohol+effects+on+the+body+pdf, which is likely used to redirect the user to a malicious payload or phishing page. The document body itself is heavily obfuscated and contains remnants of the URL, suggesting it's part of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=alcohol+effects+on+the+body+pdf
    • http://files.p5pythons.com/uploads/1/3/1/6/131606668/1a16b3773b34.pdf
    • http://files.livin-the-dream-foundation.com/uploads/1/3/1/4/131483830/fdd01.pdf
    • http://files.westvirginiastatecouncilmobilewall.org/uploads/1/3/2/7/132712088/fomasix-witipiterapi-demadu-kisararedi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/bumudigexupuxigezibomax.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1511/files/buvowufufaf.pdf
    • https://cdn.shopify.com/s/files/1/0438/8736/2216/files/65332323781.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2346/files/rarolib.pdf
    • https://cdn.shopify.com/s/files/1/0439/4565/6488/files/web_application_security_testing_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0431/7023/4524/files/93186711334.pdf
    • https://cdn.shopify.com/s/files/1/0433/9099/2549/files/40267125885.pdf
    • https://cdn.shopify.com/s/files/1/0429/2814/4543/files/59713648822.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2217/files/candlesticks_secrets.pdf
    • https://cdn.shopify.com/s/files/1/0432/6290/2438/files/12224467218.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/437899693.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/15749732493.pdf
    • https://cdn.shopify.com/s/files/1/0434/1868/1496/files/kirekolux.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_off00008478.bin
4d036c356f42f360d235689ab3e62ee2dd4dee8e30bbceafc0e6d831d2c42051
pdf-font-stream PDF embedded font (sfnt) at offset 0x8478 5168 bytes
font_01_sfnt_off00009619.bin
7c9f5a0aeeeb4a16d5d1cbecda3c079f81fa85ff4805f32347894156458788ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x9619 10896 bytes