Malicious PDF — malware analysis report

Static analysis result for SHA-256 65078e1c4533068c…

MALICIOUS

PDF

42.7 KB Created: 2020-08-02 14:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db3b4dc68bf7c7b9896fbaf9f525b515 SHA-1: d392c0ce4c51813b54d0c0f8b0d621184b66db44 SHA-256: 65078e1c4533068cf9c95a69f886a31a322f3cb09994024b66b9dff048b879bd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=ifunbox+ios+9', suggesting an attempt to lure users to malicious content. The presence of a large number of external PDF links further indicates a link farm or redirection strategy.

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=ifunbox+ios+9
    • http://files.dprservices513.com/uploads/1/3/1/8/131858592/mosulowuvud_fupuxuwowox.pdf
    • http://files.paulcotecaller.com/uploads/1/3/1/3/131384436/nemerot_bebagosizuwopo_divurivedi_liwinibitowes.pdf
    • http://files.helpabee.org/uploads/1/3/1/4/131437885/pugitibesapaje-zuxixoginol-walazozomuro-bodedowov.pdf
    • http://files.squareonegoodsco.com/uploads/1/3/2/8/132815154/tasawaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/vatilepod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nemubowakupupoda.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/91766227896.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/95915255207.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sikotifukiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/vunebezelutog.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/48317430398.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/57580067193.pdf
    • https://cdn.shopify.com/s/files/1/0434/4138/9724/files/mogirujor.pdf
    • https://cdn.shopify.com/s/files/1/0430/3778/6265/files/72920053826.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/11481189631.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_off000069eb.bin
29d6267f8b31f2196c0ad21a7454cacc0047d4d83c95a3bd1c83e384616fb4b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x69EB 4724 bytes
font_01_sfnt_off00007a1c.bin
1354cae8d9f462d4a6c6575da42ece26fea10e60196eb967fb86721256aac869
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1C 10764 bytes