Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf6be0a1c292bb8…

MALICIOUS

PDF

45.3 KB Created: 2020-08-08 17:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5308a07c4483a27290423f84225c5526 SHA-1: 487fc327d3b8acb1ac6edcc450adc979025dba3f SHA-256: bcf6be0a1c292bb8a06f21e88cfcb6eb183bdc18dac3644031fbd14a80b47a44
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of these links, https://ttraff.com/pify?keyword=apology+for+poetry+sidney+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to these URLs, suggesting the primary purpose is to drive traffic to malicious infrastructure through a link farm strategy.

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.com/pify?keyword=apology+for+poetry+sidney+pdf
    • http://kunexato.claudiafreepoint.com/uploads/1/3/1/4/131437812/ronerinemosinu.pdf
    • http://welimupa.birdsontheniagara.org/uploads/1/3/0/7/130775971/be3f1.pdf
    • http://files.cometsathleticboosters.com/uploads/1/3/1/4/131453633/49d912698eb3e.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6551/files/96777508892.pdf
    • https://cdn.shopify.com/s/files/1/0435/3412/3160/files/23414413417.pdf
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/karmakhali_bengali_news_paper.pdf
    • https://cdn.shopify.com/s/files/1/0436/6280/3097/files/muxaberizerik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54729765263.pdf
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/88373162169.pdf
    • https://cdn.shopify.com/s/files/1/0429/1641/3607/files/1637186841.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3447/files/jefogebozibunawuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5575/files/list_of_all_spices.pdf
    • https://cdn.shopify.com/s/files/1/0436/5477/4949/files/breakthrough_plus_1_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0446/5816/3865/files/animal_anatomy_and_physiology_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007468.bin
a0f407f215f8a35658c5ca3ea07a4a3fd6e0a1e08d121e54e1c8356b9d1643a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7468 5092 bytes
font_01_sfnt_off000085de.bin
d988475ab006120aceb1e1f0091f69a4e13ada2cd784d6f6c6b42125e3f6a8e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85DE 10076 bytes

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