Malicious PDF — malware analysis report

Static analysis result for SHA-256 190a405614bf95f9…

MALICIOUS

PDF

38.2 KB Created: 2020-08-13 22:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c949b00eb0af889471e8e4801c9ab8c SHA-1: 86e5a0ed87e32c7b7cc5c325237fa98fb08f95e5 SHA-256: 190a405614bf95f926892fecd5249cbcf80d59716d6c0a14e544a2db856cf669
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirector infrastructure. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL suggests an attempt to lead the user to a malicious site. No scripts were extracted, but the document body and heuristics indicate a link farm designed to obfuscate malicious destinations.

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.cc/pify?keyword=padai+veetu+amman+audio+songs++masstamilan
    • http://files.terahlynn.com/uploads/1/3/0/9/130969428/fumokagujafigu-fefewewitenemo.pdf
    • http://files.agratefulnote.com/uploads/1/3/0/7/130776575/2575861.pdf
    • http://files.jimsvintagemags.com/uploads/1/3/1/6/131636642/219047fa4f3e.pdf
    • http://wegamox.mydigitalhandprint.com/uploads/1/3/1/0/131071164/zipixawede.pdf
    • http://files.kelleycarney.com/uploads/1/3/1/4/131406663/8890351.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/1974/7996/files/can_i_trust_easeus.pdf
    • https://cdn.shopify.com/s/files/1/0429/6251/8182/files/pezevejarinomotosipufinug.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/numozetofisevi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/97809188890.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/redukenedobitaguwowok.pdf
    • https://cdn.shopify.com/s/files/1/0438/1193/0274/files/gozokudukedunezamup.pdf
    • https://cdn.shopify.com/s/files/1/0439/4080/6824/files/35898906024.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopiforosolakalaxelavur.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/gutizufawevo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdf
    • https://cdn.shopify.com/s/files/1/0429/0812/3303/files/dunugat.pdf
    • https://cdn.shopify.com/s/files/1/0434/0452/5720/files/78260874212.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b60.bin
806e02c941680cf37503825b044ad2cbe5b1f6d1604ebe9c9c487803f785be63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B60 4992 bytes
font_01_sfnt_off00005c42.bin
b3f2f878376350a256209fb84a893886ad390e14f234323971011970574922c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C42 9712 bytes
font_02_sfnt_off00007d8d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8D 4324 bytes

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