Malicious PDF — malware analysis report

Static analysis result for SHA-256 f61781b908e18868…

MALICIOUS

PDF

51.9 KB Created: 2020-09-15 13:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 890e059ac8d0e46b21384c21d1b8c205 SHA-1: 2c9475cbabe97c243191943de411d236675ea3c4 SHA-256: f61781b908e18868595ce04e5081758dc4f4c5602eb70b8a59ba7e7b5f7495c6
120 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for delivering malicious payloads or phishing pages. The document body, though heavily obfuscated, contains the text 'Night school parents guide' and the malicious URL, suggesting a lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of a malicious redirector, and 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, likely for SEO manipulation or to obscure the final destination.

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.link/pify?keyword=night+school+parents+guide
    • https://cdn.shopify.com/s/files/1/0432/6106/7428/files/best_editor_alternative_to_acrobat.pdf
    • https://cdn.shopify.com/s/files/1/0434/6835/7796/files/electronic_payment_system.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/olney_elementary_school_pta.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b61e6cd388a42f48e0b2d3385a06b1d.pdf
    • https://static.usrfiles.com/ugd/10e3af_90cff19d92714b7d84a34b371272a57d.pdf
    • https://static.usrfiles.com/ugd/6f9b04_53beaecd435b4326bd70e297f90c0138.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/35632552171.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0092/files/meredugapinusikudibivi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3130/files/47433796494.pdf
    • https://cdn.shopify.com/s/files/1/0463/4912/3741/files/vuxawosodarajidogokekogot.pdf
    • https://cdn.shopify.com/s/files/1/0465/4917/2382/files/85253426789.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/30550304473.pdf
    • https://cdn.shopify.com/s/files/1/0434/8618/3576/files/money_creation_by_chris_martenson.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/kipatodum.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0081/files/zisofafilasawemiko.pdf
    • https://cdn.shopify.com/s/files/1/0429/7474/0636/files/marorar.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_off00008cfc.bin
af4359c4e1715ab439f799a5fd1b42a336e4d37063b600b2a8e9f2bcc7b7860c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFC 5304 bytes
font_01_sfnt_off00009f0a.bin
c66246668d112bf85d537eeab463f4e5ea93ee3ae97f9cda2c13f729dd43a3d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F0A 10340 bytes

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