Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecfbe58c58b7f901…

MALICIOUS

PDF

36.5 KB Created: 2020-08-24 07:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 024261b8fd0a732454d5ed345732a9dd SHA-1: 1e4d4023f341f686b5d3e519a9ad88cc85d9d80b SHA-256: ecfbe58c58b7f901c6cb7d9ee20356c1c41d308fbbab21b734db4546c74e1554
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=alabama+state+income+tax+form+40a'. This URL is likely part of a phishing or scam campaign, attempting to trick users into believing they are accessing a legitimate tax form. The document also exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify, suggesting an attempt to distribute malicious content or manipulate search engine results.

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.cc/pify?keyword=alabama+state+income+tax+form+40a
    • http://files.nyomiwellness.com/uploads/1/3/1/4/131406258/xuwaduju-xaxonuzuvafodo.pdf
    • http://files.killjoy.info/uploads/1/3/2/8/132816158/444fa6d86d0810f.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5271/files/19856777846.pdf
    • https://cdn.shopify.com/s/files/1/0434/3070/7356/files/towakojo.pdf
    • https://cdn.shopify.com/s/files/1/0462/0989/2505/files/carry_on_jatta_2_free_hd.pdf
    • https://cdn.shopify.com/s/files/1/0434/5646/3001/files/25916576954.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/bolero_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/64968877765.pdf
    • https://cdn.shopify.com/s/files/1/0430/7599/3764/files/65458426399.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/34474217269.pdf
    • https://cdn.shopify.com/s/files/1/0451/4299/9194/files/nolejoxufusefitidikosizis.pdf
    • https://cdn.shopify.com/s/files/1/0437/2935/4903/files/rejanetatisusu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1048/8477/files/business_law_13th_edition.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_off000043da.bin
339753a4ff552fd5b6ee3e7e9d634c90e9f81917f1d6001ad878166f1730b948		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43DA 5240 bytes
font_01_sfnt_off0000558c.bin
027120ebfa1beb72d58a66f649b881eacf026cb614a35fcfe0940714d58dc176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x558C 9840 bytes
font_02_sfnt_off0000774d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x774D 4324 bytes

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