Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d9dfd4aa574e93…

MALICIOUS

PDF

50.2 KB Created: 2020-08-06 21:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 686d6ae74998c021d4883c4a912c0179 SHA-1: 82c63a8a2142ead6453892a08f80c5ba43dc990d SHA-256: 03d9dfd4aa574e93fef7d58eab78fe9d28c0e847cc2c25ff9771129e0c454119
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links, many pointing to redirector infrastructure like ttraff.com, which is flagged as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=learn+spanish+book+pdf+free', suggesting a lure to download potentially malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=learn+spanish+book+pdf+free
    • http://files.ucssp.com/uploads/1/3/2/7/132712306/5d8956f.pdf
    • http://domuxe.ov-fashion.com/uploads/1/3/1/6/131637814/tusunozufe_fizaledager_tedawedi_vudenugedil.pdf
    • http://files.gypsyjamesboutique.com/uploads/1/3/0/7/130775436/101ba2b8e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/49135223027.pdf
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/the_matrix_dezionized.pdf
    • https://cdn.shopify.com/s/files/1/0440/5103/8358/files/92513353139.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2665/files/62773145334.pdf
    • https://cdn.shopify.com/s/files/1/0431/1639/6697/files/sins_of_a_solar_empire_rebellion_mods.pdf
    • https://cdn.shopify.com/s/files/1/0430/4653/5322/files/sazebexedilesex.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/14829663699.pdf
    • https://cdn.shopify.com/s/files/1/0429/1664/2975/files/91679596039.pdf
    • https://cdn.shopify.com/s/files/1/0429/1608/5923/files/zirituza.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/fudovagutone.pdf
    • https://cdn.shopify.com/s/files/1/0431/6567/9776/files/28494357997.pdf
    • https://cdn.shopify.com/s/files/1/0433/6988/9943/files/beethoven_moonlight_sonata_3rd_movement_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1591/files/faa_aviation_weather_services.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008731.bin
83501b9a760aa3565c7ef32b376012257e9818b0f0f487767bb3c39b5a4d7d0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8731 5240 bytes
font_01_sfnt_off000098fd.bin
a815859b0dd5d045b47dcd65fc889a018629307d85a7b68f77f5abb0f1985d55
pdf-font-stream PDF embedded font (sfnt) at offset 0x98FD 10204 bytes