Malicious PDF — malware analysis report

Static analysis result for SHA-256 92086506a1f96f67…

MALICIOUS

PDF

35.4 KB Created: 2020-08-05 11:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dcddca57fbfdd2a01dad73ceda8bac4 SHA-1: 3eda6e5cb2f0b9c4d2a90bebfb371acf80ada0a7 SHA-256: 92086506a1f96f670123664ac10d4df16529a2bf6a25eea914c40599122548e2
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and a critical redirector link to 'ttraff.cc'. This indicates a link farm strategy, likely intended to obscure the final malicious destination or to distribute malware. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector and link farm.

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=guilty+crown+krone+piano+sheet+pdf
    • http://files.glamonthelam.com/uploads/1/3/1/3/131398144/dedazebejoxotabisov.pdf
    • http://bojivifo.mclendon.online/uploads/1/3/1/3/131383664/ripawav.pdf
    • http://files.nikkimarieweaver.com/uploads/1/3/0/7/130775249/sevofoxeluv.pdf
    • http://files.northbrisbanemortgagebrokers.com.au/uploads/1/3/1/4/131453252/4175065.pdf
    • http://files.comobnp.org/uploads/1/3/2/6/132681209/rijunenobufu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6141/8913/files/anomalia_de_ebstein_adulto.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39738284996.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/kobujosedeweniruk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50751207741.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/21439956134.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/547938223.pdf
    • https://cdn.shopify.com/s/files/1/0433/1814/9285/files/rojiwupakujebiribivizotam.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/79815428623.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90278046640.pdf
    • https://cdn.shopify.com/s/files/1/0438/4122/4861/files/wepowupakeka.pdf
    • https://cdn.shopify.com/s/files/1/0436/1905/7826/files/dekej.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2053/files/pewaguwezisedibejuni.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047c1.bin
ea8eeca8b161f4334acbd2b428977f9feda32a9c743139fdf781d70d35914861
pdf-font-stream PDF embedded font (sfnt) at offset 0x47C1 5532 bytes
font_01_sfnt_off00005aaa.bin
f4292cc5bfbdd3538cd604838ae8a44809fde631b1e6600eb7e9f4f1b8c21e07
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAA 10684 bytes