Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce1072278dbfcb4…

MALICIOUS

PDF

33.4 KB Created: 2020-08-21 01:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8b64d4440eed798af57b4d0dc7904aa SHA-1: f6cfee65a229947309f4cfdc750297e10bbb0f7f SHA-256: 9ce1072278dbfcb4e2cdff29160cbc1e04f51dbab3587de496a853518bd840c4
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.001 Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and several other links hosted on cdn.shopify.com and other domains, suggesting a link farm designed to obscure the true destination. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a likely phishing or malware distribution attempt.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=simple+present+negative+form+exercises
    • http://files.loesshillsalliance.com/uploads/1/3/1/4/131454496/wuboganixox_ripikovaluvox_pojodumipoxijeb_dozidiratizo.pdf
    • http://files.arisgrandman.com/uploads/1/3/1/4/131406507/bugaga_pazopozesu_kerasug.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/organization_of_shoot_apical_meristem.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/18099731743.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/25791381169.pdf
    • https://cdn.shopify.com/s/files/1/0432/0729/5140/files/74865112202.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pusowa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/52777610402.pdf
    • https://cdn.shopify.com/s/files/1/0432/6922/6656/files/agricultural_engineering_project_topics.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7900/files/the_passion_of_perpetua_and_felicitas.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/nirolurozutimetuji.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_off00004441.bin
b5bca1c4a26ddee9193c68a41a7ab2ce5e9420d228c7a2453a786a9cc2faaeef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4441 5564 bytes
font_01_sfnt_off0000571b.bin
053a955863e66d32f5674a52e6673119cdadbe795f547498fb024a186449e98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x571B 9848 bytes

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