Malicious PDF — malware analysis report

Static analysis result for SHA-256 67714126f142e1bd…

MALICIOUS

PDF

76.5 KB Created: 2020-07-09 13:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 350acde95fe18d64418e464c5cf9bd0d SHA-1: 0b625d6f706c3e7120bd7d3965616d47efa06edb SHA-256: 67714126f142e1bdd6df3bc9a8aca92ef22fb0030cadeef83c255db119e247f4
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL associated with a redirector. The document body, though corrupted, suggests a lure related to a 'US coast guard auxiliary manual'. The presence of numerous external PDF links further indicates a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious.

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/wb?keyword=us%20coast%20guard%20auxiliary%20manual
    • http://files.jm-maquoi.com/uploads/1/3/1/6/131606819/nukeposu.pdf
    • http://files.finksdeli.org/uploads/1/3/2/7/132741222/5b0259.pdf
    • http://files.castlewoodclays.com/uploads/1/3/0/8/130873907/b18a71fa7bc6.pdf
    • http://files.rioxpvista.com/uploads/1/3/1/6/131637034/36c763c9765.pdf
    • http://files.militaryhistorylive.com/uploads/1/3/0/8/130813668/latatomu_wimef_wixizagopusuno.pdf
    • http://files.corhartselle.org/uploads/1/3/1/4/131438150/c19fe1.pdf
    • http://files.maidtoshineservices.net/uploads/1/3/1/4/131437268/29f33e.pdf
    • http://files.surrenderedtochrist.org/uploads/1/3/2/6/132681656/wulegi.pdf
    • http://files.cafedatalkalamode.com/uploads/1/3/1/4/131483550/3bbbf7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://kibawof.files.wordpress.com/2020/07/gosevozukisipulapuvegipu.pdf
    • https://baxemetulej.files.wordpress.com/2020/07/gupagozogugi.pdf
    • https://tuguwanenuze.files.wordpress.com/2020/06/54432094420.pdf
    • https://gakazorex.files.wordpress.com/2020/07/70112842463.pdf
    • https://zagezaf.files.wordpress.com/2020/06/5391995265.pdf
    • https://sozerowefi.files.wordpress.com/2020/06/tivemorijujona.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51851907441.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fejatomamegebuwugibuvu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mokotutirajozejimus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lalosukiwafigoledexefes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87664315042.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_off0000e8d5.bin
15913fe89d76bd6117bef9215d5de18af165856778cf1807ef4d13b9a16d4bd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D5 5184 bytes
font_01_sfnt_off0000fa59.bin
73dee31bd29c9088856fb922b84b34b509f81f1e25544e2e0430133a02ddad70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA59 13424 bytes

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