Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ecb01df20455d2e…

MALICIOUS

PDF

41.4 KB Created: 2020-08-22 20:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e73c01d96f605719a3acc22e4b3c485b SHA-1: 0313daf3665bda1365d450c9b48b168bafc118d0 SHA-256: 9ecb01df20455d2e4d7bb209f76c999494ad3cdd152aabee264024bc7f79117d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a malicious redirector URL, disguised as an audit report. The primary malicious URL is https://ttraff.cc/pify?keyword=qualified+audit+report+example, which likely leads to 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.cc/pify?keyword=qualified+audit+report+example
    • http://files.schoolhouseyogastudio.com/uploads/1/3/1/4/131437457/xoxusexu-kiramixib.pdf
    • http://lewasa.soilregenerationgroup.com/uploads/1/3/1/4/131407406/fe8a46da25591.pdf
    • http://rusawow.dogtrainingmidwales.co.uk/uploads/1/3/0/9/130969742/towomimumawu-fomeparevupe.pdf
    • http://files.sannainspires.com/uploads/1/3/1/4/131483266/1142808.pdf
    • http://murobeso.encounter247.com/uploads/1/3/1/0/131070420/wijepewomajadeg.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/17243573022.pdf
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/42437659354.pdf
    • https://cdn.shopify.com/s/files/1/0432/7168/4252/files/gitanovalexetojimaben.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voriwatovetizejewadodo.pdf
    • https://cdn.shopify.com/s/files/1/0439/2180/1371/files/ritetemp_thermostat_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0164/2149/files/pisixew.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/ditinozod.pdf
    • https://cdn.shopify.com/s/files/1/0437/9587/3949/files/movies_tamil_websites.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9213/files/zerixikegifoz.pdf
    • https://cdn.shopify.com/s/files/1/0438/3752/2085/files/chemistry_and_chemical_reactivity_9th_edition.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_off00006549.bin
92050556a49d2bd8f4b8119b26aa97e33a59a1e554adda3ca3dbf20a48890352
pdf-font-stream PDF embedded font (sfnt) at offset 0x6549 5140 bytes
font_01_sfnt_off000076b4.bin
493ec10b6edc71018e940034565b9b3eb6da23315752283a6724fb79172ae483
pdf-font-stream PDF embedded font (sfnt) at offset 0x76B4 9908 bytes