Malicious PDF — malware analysis report

Static analysis result for SHA-256 4adf1bd7c3e56c52…

MALICIOUS

PDF

43.1 KB Created: 2020-08-21 15:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 398b867d65e5a85757d39bed256d462a SHA-1: 6a5431bfbb0fa070de78498ce8c82050c98a58c3 SHA-256: 4adf1bd7c3e56c5244bd6b609c1a4391f994055609b9b60e84b8fd08786be26e
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating an attempt to lead the user to a harmful site. The presence of a 'download button' lure further supports this. The document body is heavily obfuscated but contains the malicious redirector URL, suggesting it's part of a phishing or scam attempt.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=past+simple+exercises+irregular+verbs+worksheet+pdf
    • http://jiweb.icater2youtravel.com/uploads/1/3/1/8/131856158/5dd64e069.pdf
    • http://files.camera1.ca/uploads/1/3/1/3/131380413/pizixejawij.pdf
    • http://puzegoti.theprefabsproutproject.com/uploads/1/3/1/6/131607095/gaxidebojamul-xesuzi.pdf
    • http://sidife.tripleplaysportsplex.com/uploads/1/3/0/7/130776433/59d1500c5.pdf
    • http://sidife.tripleplaysportsplex.com/uploads/1/3
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/bufon.pdf
    • https://cdn.shopify.com/s/files/1/0433/4167/6694/files/vibujamaxogimigupini.pdf
    • https://cdn.shopify.com/s/files/1/0430/9457/3205/files/63554196111.pdf
    • https://cdn.shopify.com/s/files/1/0429/4384/0412/files/25811208540.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kenawuvotijogajutimev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1625/files/xipasodejomamigoboduv.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3557/files/fikalavewemufamimadux.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_off00004f50.bin
3263adb7eb488b37e147f8625e41d7f87d4c9699986793b5afdf06296d7dfab1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F50 5996 bytes
font_01_sfnt_off000063a1.bin
1c1e83270aa64947dffb4ab1dc2ca9fc2ad9bc7a11a4dec6a91a8b0df8dff38a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A1 12188 bytes
font_02_sfnt_off00008a4e.bin
9fce2e558c7eba93e9b4ba87b790c422cf9490aab73fe875614431ac3e7f116a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4E 16060 bytes

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