Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6fac8a6a074de9…

MALICIOUS

PDF

45.6 KB Created: 2020-08-09 10:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d7a556c224bc3e49de5b6f6507fbbb3 SHA-1: 4dce60d8c254fa145b59a98072013a3493428495 SHA-256: dc6fac8a6a074de92977bf371abac2f1cb57318373597201bfeee34cdc5abeea
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, masquerading as educational material, that redirect to a malicious URL. The primary heuristic indicates a PDF malicious redirector link, pointing to 'ttraff.cc'. This URL is used in a social engineering attempt to trick users into clicking, likely leading to further malicious content. The document body, though heavily obfuscated, contains the target URL and keywords suggesting a lure.

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=equivalent+fractions+worksheets+grade+5+pdf
    • http://files.phazetheory.com/uploads/1/3/1/6/131606598/gesotolasa.pdf
    • http://files.keepinghopealivemissions.com/uploads/1/3/1/3/131380163/586e1e77b0acb9.pdf
    • http://files.pgsarts.co.uk/uploads/1/3/1/4/131436991/2bdb3f35e81.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0209/files/lopuxugo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9759/files/58950345255.pdf
    • https://cdn.shopify.com/s/files/1/0447/5430/5175/files/breeding_betta_fish.pdf
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/88338287958.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0985/files/23010356978.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/fidupi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3065/9751/files/cambridge_primary_science_stage_5_learner_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4949/files/weather_studies_investigations_manual_2015.pdf
    • https://cdn.shopify.com/s/files/1/0437/7598/3778/files/sizenuzaledi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5850/2563/files/casa_grande_weather_radar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5130/files/laxijapisaraforuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/3538/4215/files/el_asedio_de_madrid_eduardo_zamacois.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_off000072f2.bin
80ab35c7c09c8b40af00c0dd74dd471bb74a18b28d58cf1eed622c3cccb04cfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F2 5840 bytes
font_01_sfnt_off000086ec.bin
74d21fc10cf236a71629480d587a686969db141bfbfaffbe7864a7ba54e6bf52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86EC 9956 bytes

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