Malicious PDF — malware analysis report

Static analysis result for SHA-256 d275274f115801a7…

MALICIOUS

PDF

60.3 KB Created: 2020-08-30 18:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5de16ce96cb7f1a865d0184ac851721a SHA-1: 5d3647f45022058aeda3f26dc69ffd576323c1e1 SHA-256: d275274f115801a7deff54febcd7645b26cb6019ad1704ad4147518b3ab3b298
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to a URL that impersonates a social studies worksheet. This indicates a phishing attempt designed to redirect users to malicious infrastructure. The file also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning tactic to increase visibility. The primary malicious URL identified is ttraff.ru.

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.ru/wix?keyword=social+studies+ged+practice+worksheets
    • https://cdn.shopify.com/s/files/1/0439/2199/7979/files/88792282034.pdf
    • https://cdn.shopify.com/s/files/1/0433/6146/8574/files/afro_latin_american_and_popular_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/8874/8452/files/kedakebelemimufojemiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/1656/9500/files/xujonajoposewamaremive.pdf
    • https://cdn.shopify.com/s/files/1/0436/3472/0928/files/blended_learning_articles.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/speed_velocity_and_acceleration_worksheet_8th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/7213/5074/files/goselupawewitivifuwubibe.pdf
    • https://cdn.shopify.com/s/files/1/0445/7860/3172/files/board_of_directors_resolution_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/94000929718.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/mcquarrie_general_chemistry_solutions.pdf
    • https://static.usrfiles.com/ugd/b8c837_428cec0b543d4fd7a34cd88414831e33.pdf
    • https://static.usrfiles.com/ugd/696b8a_446aa96a7007488db66e67cf749094e5.pdf
    • https://cdn.shopify.com/s/files/1/0429/7320/0537/files/mibebilemebobibi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6798/1474/files/alchemy_emperor_of_the_divine_dao.pdf
    • https://cdn.shopify.com/s/files/1/0434/1897/6408/files/walametuxupalizeberuwavar.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_off0000acda.bin
f67d65985f5e1b0cb4aea2c3af105b694ba212fd7bd58bfa95a5a50226b41b24		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACDA 5592 bytes
font_01_sfnt_off0000bfd6.bin
8dc3a458fa8c0a8c7eb04c94985bbd8217dfeac1d6bbd3bc654f258d9cddbddd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD6 10668 bytes

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