Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec6653717ed2bbe…

MALICIOUS

PDF

40.2 KB Created: 2020-08-15 08:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec3f67fe4c96b309cd58841a8ad00604 SHA-1: 045b5755291874e1e6a2977cc323138defaff366 SHA-256: 6ec6653717ed2bbe5ba4dc927810d3eb1e37449d564b7481f44e34029642863f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting an attempt to manipulate search engine results or direct users to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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=github+phishing+templates
    • http://files.guilizavaschi.com/uploads/1/3/1/3/131379296/c0cbabe04a6bc.pdf
    • http://sotaromi.alycewolfe.com/uploads/1/3/0/8/130814297/dizexa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6935/8758/files/enter_the_gungeon_iron_coin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65294746239.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/girl_scout_cadette_first_aid_badge.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/ledamibilijupewepipukisal.pdf
    • https://cdn.shopify.com/s/files/1/0436/7053/6345/files/92256197458.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6711/files/53651316477.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/agenda_planner_2020_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/7977/0019/files/4336011941.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/sumibalikugezewakonirir.pdf
    • https://cdn.shopify.com/s/files/1/0437/8987/7397/files/tebazogokiwajesobomizuju.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/gugurifitamiwef.pdf
    • https://cdn.shopify.com/s/files/1/0445/3777/4239/files/nitomaje.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_off00005e0e.bin
af247f8665cf4815d790a051b9d6ea5af661446243d3762f2bfab42845d20906
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0E 5308 bytes
font_01_sfnt_off00006ff8.bin
49dbfecf3aa3908d3fc1a9cba4ef37db6c5e3e7550e423d84b10cfc3bd346224
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF8 10624 bytes