Malicious PDF — malware analysis report

Static analysis result for SHA-256 0966bd96249a76c5…

MALICIOUS

PDF

40.2 KB Created: 2020-07-28 20:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b84134efcafc33a2813f4a83311c606c SHA-1: ee538c5580bb1d395b60dd69090974cded679f11 SHA-256: 0966bd96249a76c54967ca894035836c41435c9e7062b93ec9eb371c72896883
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious URL, 'https://ttraff.cc/pify?keyword=blantyre+coma+score+pdf', is flagged as a known malicious redirector. This suggests the document's purpose is to direct users to potentially harmful websites, likely for malicious advertising or to serve further stages of an attack.

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=blantyre+coma+score+pdf
    • http://files.cascadiannomads.com/uploads/1/3/2/7/132740865/naxajibebudebazu.pdf
    • http://files.wildtales.blog/uploads/1/3/1/6/131637178/d745e9ca.pdf
    • http://files.anthonysbeehive.shop/uploads/1/3/0/7/130740298/4803059.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/vesuzokeb.pdf
    • https://cdn.shopify.com/s/files/1/0436/9435/8681/files/90895095129.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/99319407378.pdf
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/94601290993.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/83906258219.pdf
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/34229918767.pdf
    • https://cdn.shopify.com/s/files/1/0433/6100/9829/files/58647866307.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/63850209534.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92399027362.pdf
    • https://cdn.shopify.com/s/files/1/0432/5897/0280/files/76866561448.pdf
    • https://cdn.shopify.com/s/files/1/0432/4658/3976/files/45736178103.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4095/files/48604657792.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_off00006057.bin
59028320dd1c51aff32b086d933413ca9880923913ab83d055fb09c1bfe6534d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6057 5192 bytes
font_01_sfnt_off000071e9.bin
6ed736fbbf02f741ce05c9a3503ba4f9d67106cfe6700ca683c5b18c30432243
pdf-font-stream PDF embedded font (sfnt) at offset 0x71E9 9980 bytes