Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b168adff0bc1b7a…

MALICIOUS

PDF

42.1 KB Created: 2020-07-14 20:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 738a30574db11f812c9809800656c092 SHA-1: dfc0105b39051bf1179b28ddbc412baf4f7b4114 SHA-256: 6b168adff0bc1b7a509a99e72cd614980f0f86dd64589d54cc600ffc52f22dfb
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the URL https://ttraff.com/wb?keyword=convertir%20foto%20pdf%20a%20jpg is associated with malicious activity. The heuristic 'PDF_SEO_LINK_FARM' further suggests a large number of external PDF links, many of which are hosted on WordPress, potentially for SEO manipulation or to obscure the true malicious destination. No scripts were extracted, but the presence of malicious links points to a phishing or redirection attempt.

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=convertir%20foto%20pdf%20a%20jpg
    • http://files.nastas.org/uploads/1/3/2/6/132681596/4001768.pdf
    • http://files.mcadoos.ca/uploads/1/3/2/7/132740639/4007997.pdf
    • http://files.readingsbytara.com/uploads/1/3/1/6/131607866/vuvenonimukoko.pdf
    • http://files.helptakeaction.com/uploads/1/3/2/6/132681938/3009213.pdf
    • http://files.morabezacatering.com/uploads/1/3/0/7/130740375/basifepexojotelazuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://tupozubobusi.files.wordpress.com/2020/06/63063676375.pdf
    • https://wunujixe.files.wordpress.com/2020/07/76559048166.pdf
    • https://fezipok.files.wordpress.com/2020/06/kugowuw.pdf
    • https://rudagus.files.wordpress.com/2020/06/zunalafijiwopabop.pdf
    • https://vudesezipi.files.wordpress.com/2020/06/lorefomalidurufunutix.pdf
    • https://lawabojivek.files.wordpress.com/2020/07/tinus.pdf
    • https://kagogitituxo.files.wordpress.com/2020/07/kebemakaritebimaketitet.pdf
    • https://nuxapujo.files.wordpress.com/2020/07/15378709040.pdf
    • https://cdn.shopify.com/s/files/1/0430/2667/7913/files/98461576596.pdf
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/tezugasumajulufuvusanaso.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/49418761895.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/64989875230.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/wedoturobulozema.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/gumukagelura.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/66704368483.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_off000065e2.bin
96030109e86d1e457cfe8fd11252b6cc6b060a50fe91e26ee43ab91f4eee6fde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E2 4948 bytes
font_01_sfnt_off000076d3.bin
756f082f5330e0ecf03e18632e85119f52f93979ae9d1db5b1f1cd4431a85f83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D3 10740 bytes

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