Malicious PDF — malware analysis report

Static analysis result for SHA-256 053cf406c56a5540…

MALICIOUS

PDF

56.7 KB Created: 2020-09-12 21:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb8f6b1b393e9aeef0959e0aef3a454e SHA-1: 1e34c29a3a3d83c34e874c44a61a041e6d1b6d86 SHA-256: 053cf406c56a5540dd2ac23ea58f59b0547a7b297206ce6a1ffc6302d70ef113
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL and text related to a car stereo manual, suggesting a lure. 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.link/pify?keyword=sony+wx-920bt+car+stereo+manual
    • http://zosutul.breakersgorey.com/uploads/1/3/0/9/130968917/7351944.pdf
    • http://kanofuf.uniontownartclub.org/uploads/1/3/0/7/130739974/c38b0dcec15636.pdf
    • http://files.us-msminer.net/uploads/1/3/1/4/131452870/vejugotulipi.pdf
    • http://tosowavir.liekeanna.com/uploads/1/3/1/4/131409546/5445999.pdf
    • http://lutitobe.terahlynn.com/uploads/1/3/1/3/131378960/363bb88123aa9c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/7a359d_03a94f26275c450c9deeb65c01a7adfb.pdf
    • https://static.usrfiles.com/ugd/455f95_bafd77ade5e746fbb0dc632d6a008bce.pdf
    • https://static.usrfiles.com/ugd/1b7c00_664701aeffdc4654a56e844faa66c677.pdf
    • https://static.usrfiles.com/ugd/5e81b9_8ea282bbe42b4a33880e52392f069856.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_40e59da1f45f468a8a330c708e97794f.pdf
    • https://cdn.shopify.com/s/files/1/0434/2058/2050/files/captain_underpants_movie_300mb.pdf
    • https://cdn.shopify.com/s/files/1/0434/7048/7712/files/bus_eireann_tralee_to_cork.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/wuxujekadogemojexezoxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1939/files/ketefanabebigopevulamupi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/vawexidifepomi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/29439404659.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_off00009583.bin
9d6d280a4c04c23b1fbe4d7181d945f833be2a5276c920aa85b2f9d3b86560ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x9583 5912 bytes
font_01_sfnt_off0000a9a4.bin
351ba1ac8d0c2b13ff2824ec780a8f0518ff8756156f9a83bb2a6f48aa61f7b0
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9A4 13688 bytes