Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dcf0f8934587ba8…

MALICIOUS

PDF

46.4 KB Created: 2020-08-19 21:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9da2ea75b644180cf385464ebd081584 SHA-1: d3a3055229d54a03bad853280bbef734dd25517f SHA-256: 0dcf0f8934587ba89b5f5b3a353ae0aa95233b0c1e490f83d3fecfc699e4c7b1
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with the primary URL `https://ttraff.com/pify?keyword=wordpress+elementor+templates` identified as a malicious redirector. The heuristic `PDF_SEO_LINK_FARM` indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=wordpress+elementor+templates
    • http://files.reading2reading.com/uploads/1/3/1/4/131411281/4694864.pdf
    • http://files.hqp.org/uploads/1/3/1/4/131437017/janajovaw_vewemezorixiraz.pdf
    • http://files.vancemedical.com/uploads/1/3/0/8/130874298/1a1706.pdf
    • http://goniruju.hunterlegacyyearbook.org/uploads/1/3/1/6/131606000/a170469.pdf
    • http://files.chicagoansunited.org/uploads/1/3/1/4/131407315/binadiwibipazin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/misoxalifizamotatara.pdf
    • https://cdn.shopify.com/s/files/1/0439/9346/4990/files/wibanisutinigupukutazif.pdf
    • https://cdn.shopify.com/s/files/1/0436/3508/1374/files/webuxizifasevazin.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/52858627848.pdf
    • https://cdn.shopify.com/s/files/1/0440/1194/6134/files/jizexejokunitojuzepozo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/rizm_algorithmic_trading_platform.pdf
    • https://cdn.shopify.com/s/files/1/0429/2752/1948/files/63137114473.pdf
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/bekukenovimiwebiwikeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/64352674011.pdf
    • https://cdn.shopify.com/s/files/1/0438/3614/5814/files/22949467489.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_off00006fa5.bin
d1bf3bed257cc9e251cec646124e45a572c4c69822a4eb3d1d7b5ee59886f923
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA5 5116 bytes
font_01_sfnt_off00008102.bin
f19a20736e6f717a62cdcb94d95d9b09b056a3281366c1c79f45c5d09d5eeea2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8102 13716 bytes