Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ac587eba2bd553…

MALICIOUS

PDF

45.5 KB Created: 2020-08-19 16:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abcda2f868ac2cdcced11514138fd3d1 SHA-1: b95905f3ae51370ccedff182c39fddd85248da01 SHA-256: f8ac587eba2bd553f02127624b72793c6ee0578c86cd3757d80b375a6c5566bc
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a resource for Microsoft Office PowerPoint templates. The link, https://ttraff.cc/pify?keyword=microsoft+office+powerpoint+background+templates, leads to a known malicious domain. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, many hosted on Shopify. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=microsoft+office+powerpoint+background+templates
    • http://files.shawsblindsfairburn.co.uk/uploads/1/3/0/7/130774973/rivavep.pdf
    • http://files.atticus-guidance.com/uploads/1/3/1/3/131380626/tivevefi-rojapubidi.pdf
    • http://tirus.sklepikartstudio.com/uploads/1/3/1/6/131636612/7d59b078.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/jixolavakidazorosuza.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5268/files/59660512537.pdf
    • https://cdn.shopify.com/s/files/1/0431/7125/0333/files/nukudukokapirumezuped.pdf
    • https://cdn.shopify.com/s/files/1/0436/2004/0866/files/95189258493.pdf
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/komaziripedipozuwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9089/4247/files/69891600850.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15636630427.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4549/files/wanenodisagosanodetox.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2753/files/92343971599.pdf
    • https://cdn.shopify.com/s/files/1/0428/9878/4422/files/almera_n16_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2109/0471/files/fipapikodusagabular.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_off00007297.bin
36752e110a3f1f732512a884682a7fd5c3f2838321551940d8334cba3a601746		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7297 5776 bytes
font_01_sfnt_off00008639.bin
7868c9d3e1e312211f2cf3e47fa21692729409803978a3210ba9399b1ae3e744		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8639 10080 bytes

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