Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25f849f49ad9256…

MALICIOUS

PDF

52.8 KB Created: 2020-08-15 14:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6e532e6143a2e51a7c79954771be924 SHA-1: f35ba02bf8465bce8a81892d1021b07cfe94e7af SHA-256: b25f849f49ad92568ed7a7d846e78cb0b72554f1baafbcd03e5f50cf2c2abad0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/wb?keyword=ts%20rythu%20bandhu%20application%20form%20pdf`. This link is presented within the document body, disguised as an application form. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on `cdn.shopify.com`. While some of these Shopify links are benign, the presence of the malicious redirector indicates a clear intent to direct users to harmful content.

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.cc/wb?keyword=ts%20rythu%20bandhu%20application%20form%20pdf
    • http://files.stjamescheboygan.org/uploads/1/3/0/9/130969231/gosowodefaso.pdf
    • http://files.childrenssunflowerhouse.net/uploads/1/3/1/4/131453645/verifamipox.pdf
    • http://files.omnifensive.com/uploads/1/3/1/4/131407802/pewotukavizuruk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6488/5402/files/77849273122.pdf
    • https://cdn.shopify.com/s/files/1/0434/9827/4978/files/fundamentals_of_computer_networking_and_internetworking.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/cfrp_material_properties.pdf
    • https://cdn.shopify.com/s/files/1/0449/8151/8494/files/athlean_x_arm_workout.pdf
    • https://cdn.shopify.com/s/files/1/0428/6903/1078/files/gomoxafifakezi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6143/files/28135572163.pdf
    • https://cdn.shopify.com/s/files/1/0432/7617/3472/files/58663534328.pdf
    • https://cdn.shopify.com/s/files/1/0435/4460/8932/files/semukepesuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8903/files/nikoturuviva.pdf
    • https://cdn.shopify.com/s/files/1/0431/1813/3405/files/96250584950.pdf
    • https://cdn.shopify.com/s/files/1/0428/7932/0220/files/microsoft_system_administrator_interview_questions_and_answers.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000681e.bin
7f9b7a843b940e90ac4a7a32ce48e3f805b7609f99d2e75525e5b036124008ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x681E 5588 bytes
font_01_sfnt_off00007ae5.bin
c102ceeecae0d4185dd56ce488fb04ca626a506cc21f5dec988292815d7ae1f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE5 10548 bytes
font_02_sfnt_off00009efa.bin
0d7a92828fb34c46272def7401d297891c72c028a4bdfa4d2814ce18bde6b281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EFA 16164 bytes
font_03_sfnt_off0000b44c.bin
9a8379228c1e29ae654d560b6eed0e1c484b86427d2c80eeb23994ee8a3540f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB44C 4660 bytes

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