Malicious PDF — malware analysis report

Static analysis result for SHA-256 929f9688a336d4e2…

MALICIOUS

PDF

37.5 KB Created: 2020-08-16 14:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0369fb50270708a0596ae1e43ca790a5 SHA-1: 0fac3a2f660dc67a3ab898ab50179f433df6a2e3 SHA-256: 929f9688a336d4e2cf93717e3501da752e1feb66c6bc9c5a586628d3d0977d3f
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wb?keyword=waiting%20for%20godot%20book%20pdf%20free'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including 'https://cdn.shopify.com/s/files/1/0435/2750/4024/files/archicad_23_tutorial.pdf'. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains references to the malicious URL, suggesting a lure to a seemingly legitimate search result page which likely hosts further malicious content.

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.com/wb?keyword=waiting%20for%20godot%20book%20pdf%20free
    • http://files.angelais.com/uploads/1/3/1/1/131163540/kebibej_domonorekot_gozasuvoz.pdf
    • http://files.kennylakehawks.com/uploads/1/3/1/6/131606248/1619585.pdf
    • http://files.inspiredwellbeing.com.au/uploads/1/3/1/1/131164027/pazafop.pdf
    • http://files.carolynbridgetkennedy.com/uploads/1/3/0/7/130739212/jevuzinagitini.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/archicad_23_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/24585354955.pdf
    • https://cdn.shopify.com/s/files/1/0430/0816/3993/files/tetomigunedugoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/83384157540.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/48000312503.pdf
    • https://cdn.shopify.com/s/files/1/0434/1281/6039/files/70448724781.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/riwemobag.pdf
    • https://cdn.shopify.com/s/files/1/0430/3339/5353/files/navarre_bible_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/womil.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_off0000483f.bin
65a1028d8fd19418d47a15fd3eb0e9eb35bb279621d0bbc8a4066db261a0e88b
pdf-font-stream PDF embedded font (sfnt) at offset 0x483F 5004 bytes
font_01_sfnt_off00005954.bin
269d97ce44c1150e05add90854ce0596c320362c92f4da47ea4d9bde531141f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5954 9896 bytes
font_02_sfnt_off00007b28.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B28 4324 bytes