Malicious PDF — malware analysis report

Static analysis result for SHA-256 51900d7590237544…

MALICIOUS

PDF

47.4 KB Created: 2020-08-11 12:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ab553c5f034c37eff28969842d1ccd6 SHA-1: 3f4c97d001b0845258d89ac1f156f3df72e32e22 SHA-256: 51900d7590237544232e914f2c0999cc1aacb19d7d72ba8ccddb6b2d894432cc
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links to external PDFs, many hosted on Shopify. This suggests a link farm or SEO poisoning attack designed to drive traffic to malicious infrastructure. The primary intent appears to be redirecting users to potentially malicious sites under the guise of providing legitimate PDF content.

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/wb?keyword=global%20justice%20and%20global%20rule%20of%20law%20pdf
    • http://files.francescomptonlibrary.com/uploads/1/3/0/8/130813420/linemetana_jetitudoxururi_tabezevugife.pdf
    • http://files.brassattack.com/uploads/1/3/1/3/131398182/niwox_tebevuvawu_kavigitidun.pdf
    • http://files.bmhc.net/uploads/1/3/1/3/131379356/jojeto-kizedaja-dowajiwoduzos-nitinaxemola.pdf
    • https://cdn.shopify.com/s/files/1/0438/0357/4432/files/bled_orthographe_grammaire_conjugaison_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/larabobed.pdf
    • https://cdn.shopify.com/s/files/1/0429/6677/8009/files/bikulofi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/vexefuvisowikexuzefafuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/wowuxenikogegalofe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7057/8070/files/principles_of_geotechnical_engineering_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/6232/0536/files/vemowawu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/10169716788.pdf
    • https://cdn.shopify.com/s/files/1/0434/9024/6822/files/transport_company_profile_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/7115/2023/files/59076681616.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_off00007af7.bin
b8fb45a41fbd9e953897f369b073c43a944acedf1e4457412e44355f9c20c272
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF7 5664 bytes
font_01_sfnt_off00008e59.bin
f322ad0ced23ec31398ccebd48130f1656c6472d994573e2afcf9323f2e3e7ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E59 10240 bytes