Malicious PDF — malware analysis report

Static analysis result for SHA-256 0318af1166d611bd…

MALICIOUS

PDF

102.6 KB Created: 2020-08-31 00:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5dea3b0debbbe93445a668164a6b0a4 SHA-1: b8bb14f34032a1495808f21dee47e31ca007ece7 SHA-256: 0318af1166d611bd2e7b49e82403e948d7ce9540df57cab860e389ccfc56bd28
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document also exhibits characteristics of a password-protected archive lure, aiming to trick users into downloading further malicious content. While no scripts were directly extracted, the PDF structure and malicious URL suggest an attempt to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.cc/wix?keyword=cu%25C3%25A1l+es+el+graph+de+f%2528x%2529%253Dx2-2x+3+bra
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/455f95_c47d2fbe367641219ed8c66c79f83d99.pdf
    • https://static.usrfiles.com/ugd/79cb75_43f3aa381fde43d19d7cd864f94b54b0.pdf
    • https://static.usrfiles.com/ugd/2e16aa_52d5d9c7add841c58abaeb8a0072e1e6.pdf
    • https://static.usrfiles.com/ugd/33a2e4_60f97a2de56644a49661844d28f80890.pdf
    • https://static.usrfiles.com/ugd/a44510_77fc5b66e52544338c82c808ceb0067c.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdba102466e944d28201341681839255.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9970b5da675482bb4c053a541134968.pdf
    • https://static.usrfiles.com/ugd/d78803_56bf996a655c4f618b05b966b8b87564.pdf
    • https://static.usrfiles.com/ugd/5438e3_116ae4bc141c47e5a113ded883bbdc95.pdf
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/koremofonomudu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7087/files/dubafogirebofojewuliputel.pdf
    • https://cdn.shopify.com/s/files/1/0437/3882/4858/files/dinamani_tamil_news_paper_today.pdf
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/quartz_filter_mac.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/acdc_highway_to_hell_guitar_tab.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b7f122c35bf4c06913c209b901232f2.pdf
    • https://static.usrfiles.com/ugd/3f0e57_94fdd3dd007b43c19edfdb5533e7a29c.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012855.bin
fdce4a48c9b71993d472b12e3852a2002e6d210fdbf339e244a9cc1a6529523b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12855 6176 bytes
font_01_sfnt_off00013ce2.bin
d6f0a421c608c3d1103a2f78472ac5aa8f3f000267594cc67e1f71a3303f1e89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE2 16724 bytes
font_02_sfnt_off00017081.bin
7d0269e843f6f165085859d3564dee0f65d841b1497c7b62b7ca5b4940baccb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17081 17400 bytes

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