Malicious PDF — malware analysis report

Static analysis result for SHA-256 9495d2591d0cca8f…

MALICIOUS

PDF

39.7 KB Created: 2020-08-17 01:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bda6f965385794907dfcb6a686f74d12 SHA-1: 3e206441a2e1f4144375193d9d07ebc084510a18 SHA-256: 9495d2591d0cca8fd6b72b5eacb4d78de3ac6b3d199b6ce41153f333855819fb
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to a known malicious redirector. The document body, though partially obfuscated, contains text related to educational worksheets and the malicious URL. The primary malicious URL is https://ttraff.ru/pify?keyword=associative+property+of+multiplication+worksheets+grade+3, which likely serves as a lure to redirect the user to further malicious content. The PDF also contains a large number of other embedded links, many hosted on Shopify, which is characteristic of SEO link farm abuse.

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=associative+property+of+multiplication+worksheets+grade+3
    • http://files.patricialino.com/uploads/1/3/1/8/131871480/238345.pdf
    • http://sizofumo.texasfinesse.com/uploads/1/3/2/6/132696111/lotufulis_vivipe_ronigolitoj.pdf
    • http://files.operationglobalfreedom.com/uploads/1/3/1/4/131407423/wiwilewik.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/naguvezefiduvunutub.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/fijakesevanapizige.pdf
    • https://cdn.shopify.com/s/files/1/0452/2465/7056/files/benicar_hct_bula.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/bozaraninokemuxopa.pdf
    • https://cdn.shopify.com/s/files/1/0438/1124/2144/files/tenimimokogi.pdf
    • https://cdn.shopify.com/s/files/1/0452/5555/7282/files/bssc_inter_level_2020_notification.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4198/files/sajesun.pdf
    • https://cdn.shopify.com/s/files/1/0432/4537/1549/files/37418940006.pdf
    • https://cdn.shopify.com/s/files/1/0430/1219/4463/files/alarm_app_using_android_studio.pdf
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/rite_temp_thermostat_manual.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_off00004d16.bin
658489b5b85cf6eaebcb01fb2803a7c6cee0d1dd424028e38f976994c3def3a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D16 5920 bytes
font_01_sfnt_off00006130.bin
ba4037bc09ebf7f2f782d126f799c20761a6b37f50fcd99dad3318e4a90b30fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6130 10040 bytes
font_02_sfnt_off0000837b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x837B 4324 bytes