Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2bd2903f769e80…

MALICIOUS

PDF

45.0 KB Created: 2020-08-05 01:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aa7e3ea46596af53238f1df30a3964e SHA-1: 363596cf143d2dce44cabc2a313b837aba95f24e SHA-256: ba2bd2903f769e80ec32a44bba0f0e7d563c8a05435c54e9d640e6b053ec73ea
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a known malicious redirector. The document body text and embedded URLs suggest a lure to download free books, which is a common tactic for distributing malware. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=instrumentation+and+control+books+free+download+pdf
    • http://files.holisticcoachandcounsel.com/uploads/1/3/0/9/130969048/letulelu.pdf
    • http://files.coastalkayakcharters.com/uploads/1/3/1/0/131070374/3283298.pdf
    • http://files.wc4s.org/uploads/1/3/2/7/132712268/472442.pdf
    • https://cdn.shopify.com/s/files/1/0432/5149/9170/files/17831180474.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/duvobekav.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/basic_human_anatomy_roberto_osti.pdf
    • https://cdn.shopify.com/s/files/1/0433/5416/1310/files/najiwakogagisamunubinisi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6046/9660/files/jasmuheen_the_food_of_gods.pdf
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/suxelude.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2633/files/single_variable_calculus_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/migabob.pdf
    • https://cdn.shopify.com/s/files/1/0433/6985/7176/files/2259665120.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1357/files/aptis_practice_tests.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/digital_printing_company_profile.pdf
    • https://cdn.shopify.com/s/files/1/0447/9614/9921/files/assam_tet_book_english.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b2e.bin
87badb89b64000dd96537f648fe48f8aef809377dcaef6886bd083909a235e95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2E 5536 bytes
font_01_sfnt_off00006dec.bin
49f1c345582212729590e0456707ca92d3838aef8cba26fbcaa28f8c5b0a0640		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEC 2116 bytes
font_02_sfnt_off000077b7.bin
6a985e044b1d328ca83a605270c2934771df2f11bee8567f322bb1696c80353e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B7 15076 bytes

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