Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d1108627c697a6c…

MALICIOUS

PDF

44.6 KB Created: 2020-08-07 08:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd58b7f72e23fc15444f0f981d5fea95 SHA-1: 42d561f376de9fd8824dc97bf5718c06e10b7a17 SHA-256: 6d1108627c697a6c120b47256318de0051a36921b0009722c4bb4ef964877a16
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=adjectif+qualificatif+%25C3%25A9pith%25C3%25A8te+pdf'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, one of which is 'https://cdn.shopify.com/s/files/1/0437/6641/5514/files/soxutemobifo.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to lure users to malicious content.

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.ru/pify?keyword=adjectif+qualificatif+%25C3%25A9pith%25C3%25A8te+pdf
    • http://files.crawfordmusic.org/uploads/1/3/0/7/130739856/dovatixaximupeb_wumaxid_bapipominapuza_gavuwox.pdf
    • http://files.hptservices.com/uploads/1/3/0/7/130739132/nuvupesozigusowar.pdf
    • http://files.beamfitness.ca/uploads/1/3/1/3/131398259/tubemegijajaxolumuja.pdf
    • http://files.prek-12resources.com/uploads/1/3/1/3/131379268/141954c3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6641/5514/files/soxutemobifo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2661/9300/files/download_photobucket_album.pdf
    • https://cdn.shopify.com/s/files/1/0435/1151/3252/files/le_branhamisme.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pinabazebovo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5805/files/interior_angles_of_polygons_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/6566/1853/files/diffusion_and_effusion_of_gases.pdf
    • https://cdn.shopify.com/s/files/1/0431/6259/9585/files/25686143618.pdf
    • https://cdn.shopify.com/s/files/1/0437/4183/9511/files/benim_hocam_video_ders_notlar_eitim_bilimleri.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/kedopemopusikizoxaloxari.pdf
    • https://cdn.shopify.com/s/files/1/0429/8555/4073/files/30503255724.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/jukamopewanovoruxerun.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5130/files/wefoxaxunividogup.pdf
    • https://cdn.shopify.com/s/files/1/0432/0215/0557/files/76155128678.pdf
    • https://cdn.shopify.com/s/files/1/0433/9374/5046/files/32433121922.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_off00006b9b.bin
69651f8f378f7f251671f3633bc3f6ddc523b32a646b9127c7cb1b1f348b2321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9B 5444 bytes
font_01_sfnt_off00007d8d.bin
c28bd3f6d2f35e2a01fcf5d439cb6c17ff3db41c17b656a702bdd935a535c902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8D 12040 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.