Malicious PDF — malware analysis report

Static analysis result for SHA-256 223a52f08077fa39…

MALICIOUS

PDF

48.5 KB Created: 2020-08-24 10:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89b7aee46d0df6eaf2a5309a0f104b26 SHA-1: f5392d1e95b2d455bafe4c704468026bbf960df0 SHA-256: 223a52f08077fa39020d4a066adbd42722edc57e6602afbd7d61ea4c50f9d143
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com', which is used to lure users with a 'kaplan act practice test 1 answers' keyword. This indicates a phishing or scam attempt disguised as educational material. No scripts were extracted, but the primary attack vector is the malicious redirection link.

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.com/pify?keyword=kaplan+act+practice+test+1+answers
    • http://vafumaxon.friendlifehacks.com/uploads/1/3/2/6/132682137/879379.pdf
    • http://zarufenu.debbiesangelsproductions.com/uploads/1/3/1/4/131453206/7729057.pdf
    • http://files.roanmountainglass.com/uploads/1/3/0/7/130776125/fofapaxopetekuzenob.pdf
    • https://cdn.shopify.com/s/files/1/0435/9087/7339/files/bujekokiligetasi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2426/8968/files/xapobofid.pdf
    • https://cdn.shopify.com/s/files/1/0433/6284/4837/files/67615538057.pdf
    • https://cdn.shopify.com/s/files/1/0459/9663/8365/files/staples_5_mil_laminating_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/9970/7810/files/auditoria_fiscal_procedimiento.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/zavatojur.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3077/files/reliability_centered_maintenance_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0434/3971/8562/files/lucas_giolito_fangraphs.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/14629444751.pdf
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/82121390309.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/fejuxatenaligulolevema.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/67622395089.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3756/files/53568845559.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_off00007f25.bin
015590afa752790a9a3a016add46453f7cd9a6bae8ac643a37f88e0de462d3cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F25 5040 bytes
font_01_sfnt_off00009071.bin
8932f27bac9e73d6c92e40080ddcc77211298bf8b2b429d2269912bca22541a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9071 10844 bytes