Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cdda9439d6ae7b5…

MALICIOUS

PDF

46.5 KB Created: 2020-08-31 08:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5527204742bc1b39e1d268ac70f1fc3d SHA-1: 8056376e67ee59ed89b8452a8d3d6501c9439141 SHA-256: 6cdda9439d6ae7b56f4cf00343ac68fe830671d76441b74446a77da585856125
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests an attempt to direct the user to malicious infrastructure, likely for further exploitation or phishing. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing 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.com/wix?keyword=case+in+point+complete+case+interview+preparation+7th+edition+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4434/7802/files/migikexanowifafa.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/58737232036.pdf
    • https://cdn.shopify.com/s/files/1/0431/9140/2660/files/bidixevewamodexowitaj.pdf
    • https://static.usrfiles.com/ugd/e3325f_9ddde77145e64fa1a3864b83134876ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_a98635a9ebb64c56a71ed80cefcb1d47.pdf
    • https://cdn.shopify.com/s/files/1/0431/0374/8260/files/77378348345.pdf
    • https://cdn.shopify.com/s/files/1/0462/3276/4567/files/divinity_original_sin_ee_build_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/mikulagurafupazidi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/vumijirunutor.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/velomop.pdf
    • https://cdn.shopify.com/s/files/1/0436/1817/3086/files/xewawun.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1362/files/bts_wallpaper_hd_2018.pdf
    • https://cdn.shopify.com/s/files/1/0439/4287/1208/files/pibenexiwodakuni.pdf
    • https://cdn.shopify.com/s/files/1/0437/2480/0154/files/ejemplo_de_acta_constitutiva_de_una_sociedad_cooperativa_mexicana.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3404/files/xekaj.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_off0000762b.bin
d28c7acb38783a08ef9801155b0edd5c8b4b1d66ee06bda1176b7448d1f55e26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x762B 5532 bytes
font_01_sfnt_off000088e0.bin
48d892c4334386eb17f336ad43737033b0c95079256e5dbb365b8e3fa4bd5578		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88E0 10560 bytes

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