Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b9c3ed47fa6303…

MALICIOUS

PDF

37.2 KB Created: 2020-08-21 09:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d689798ba44c7f077a071c3cb498d33 SHA-1: cce73ab87728a6d871365f6d86ce208af9271ae2 SHA-256: 06b9c3ed47fa63032978d9e000c47944f250a0ff873074bdc2809c0ce252f029
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to a redirector service known for malicious activity. The document body itself is heavily obfuscated but contains the primary malicious URL. This suggests the PDF is designed to lure users into clicking links that lead to further malicious content or downloads.

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=le+sueur+county+sheriff+report
    • http://files.ccmooresville.com/uploads/1/3/1/3/131381819/tanupip.pdf
    • http://files.nextcow.com/uploads/1/3/1/4/131408970/zovipoxelenowu_jiruwusetupu_jojowafefi_fasepuwilo.pdf
    • http://files.bwaltonwrites.com/uploads/1/3/1/3/131383493/zemolezu_xijuzox.pdf
    • http://vawibu.familyhistoryguy.net/uploads/1/3/0/8/130874493/3741528.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2131/0880/files/8446891097.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/gapabodewem.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/zerarub.pdf
    • https://cdn.shopify.com/s/files/1/0433/7418/2563/files/bailey_risch_twitter.pdf
    • https://cdn.shopify.com/s/files/1/0434/3103/5047/files/isaiah_43_commentary.pdf
    • https://cdn.shopify.com/s/files/1/0437/7044/5975/files/bendix_valve_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/antrag_schwerbehindertenausweis_hessen.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/sezimusikegojuridibibegek.pdf
    • https://cdn.shopify.com/s/files/1/0434/9735/7472/files/jeppesen_private_pilot_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/40848419607.pdf
    • https://cdn.shopify.com/s/files/1/0432/9301/6222/files/detitulajidow.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_off000054eb.bin
9f7af6b5190693dac1ce06124fe0b3f00b3594d8fd19263bb51b7bed53a8b9c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x54EB 4904 bytes
font_01_sfnt_off0000659f.bin
29f598cedb58bdd873e6f817c41ff70110ce270af3cf58cd4cee454768a24972
pdf-font-stream PDF embedded font (sfnt) at offset 0x659F 10080 bytes