Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d00ac6198ab0a9…

MALICIOUS

PDF

42.6 KB Created: 2020-08-12 09:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e746a7aa17708625807939591745796b SHA-1: 14c3d9177fe5049d1dd70e040b15b87c24799a33 SHA-256: 88d00ac6198ab0a938e5d236bb6994d1b2d58d5cfc3f20362ecfa9c63e8bfaa6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attack pattern.

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.ru/pify?keyword=phytochemical+functional+foods+pdf
    • http://files.daonrestaurant.com/uploads/1/3/0/9/130969489/wagufoxalasimoz.pdf
    • http://rofimoxol.crumblesbynicole.com/uploads/1/3/1/4/131483068/327090db1.pdf
    • http://kagupor.magsaysaywecare.com/uploads/1/3/1/8/131856271/fuzuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/4164/2906/files/72149653362.pdf
    • https://cdn.shopify.com/s/files/1/0433/6346/7414/files/dofakuwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6230/3637/files/el_cantar_de_roldan_resumen.pdf
    • https://cdn.shopify.com/s/files/1/0437/4616/4897/files/88025724.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5829/files/baxupuzunudado.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90685913575.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
    • https://cdn.shopify.com/s/files/1/0432/6244/3683/files/weromupizimexitedegurefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8212/9320/files/ordering_cost_and_carrying_cost.pdf
    • https://cdn.shopify.com/s/files/1/0429/6884/2393/files/logabevakekosutabivugajod.pdf
    • https://cdn.shopify.com/s/files/1/0439/8841/8718/files/majoditaginegoxen.pdf
    • https://cdn.shopify.com/s/files/1/0434/4014/4534/files/forijapabufomibabod.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3205/files/15060400086.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/
    • https://cdn.shopify.com/s/files/1/0439/8841/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066ec.bin
cde33e71edadb3db225ef27ac6046f706ec23d3b301936adfd9501e9ede72411
pdf-font-stream PDF embedded font (sfnt) at offset 0x66EC 5404 bytes
font_01_sfnt_off00007930.bin
61baa38fd7bcadd303f3763624a615768423d2eee5fdda39a775fec620b42937
pdf-font-stream PDF embedded font (sfnt) at offset 0x7930 10640 bytes