Malicious PDF — malware analysis report

Static analysis result for SHA-256 82882f598de9356a…

MALICIOUS

PDF

48.5 KB Created: 2020-07-29 16:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eae92b923c1aec598914a12eb219b034 SHA-1: af9b066138f78bb3a70625ce2a94f9a3eb21f69c SHA-256: 82882f598de9356aeec6fde3e28ad4b75bad055e7516ce12e3ec05501753dce6
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links redirects through 'ttraff.com', which is identified as known malicious redirector infrastructure. The ML classifier strongly indicates maliciousness, supporting the attack pattern of luring users to malicious sites.

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/pify?keyword=advantages+and+disadvantages+of+circuit+switching+and+packet+switching+pdf
    • http://files.hybridpilotservices.com/uploads/1/3/0/9/130969573/7234539.pdf
    • http://files.hiddenwonders.co.uk/uploads/1/3/0/8/130813906/6af70319bea9a.pdf
    • http://files.loganshappyrocks.com/uploads/1/3/1/4/131453588/1a462.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/bogobasawukedivexexis.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/98185649626.pdf
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/22590571164.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/32935333389.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/pexifunir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7655/8746/files/gopijadaki.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/42421886970.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/benivat.pdf
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/87988519952.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/wijawujetujufuperiweriwib.pdf
    • https://cdn.shopify.com/s/files/1/0434/9214/7352/files/3863682257.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/59046974215.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/binunus.pdf
    • https://cdn.shopify.com/s/files/1/0430/0744/3103/files/96508127678.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/
    • https://cdn.shopify.com/s/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007da0.bin
8aa948acb10e93b2b9e1b2e754e84c2ca143ed9bc72511a4e66df38b6d409092
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA0 5472 bytes
font_01_sfnt_off00009052.bin
acecdd6a6e38a7e460a6ca43e46c00c3c6ce03c1482b7cdbbfdebfc3f1b32ff3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9052 10788 bytes