Malicious PDF — malware analysis report

Static analysis result for SHA-256 23af1b4ca4697aa2…

MALICIOUS

PDF

52.8 KB Created: 2020-08-09 18:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 458079aae84c175d835b22f94becf21a SHA-1: b1e47126f3b275cab663622f744841d2b05a97bc SHA-256: 23af1b4ca4697aa2b3a600a12fd20fb435d54795d0b9b588b109c6e4de4b0e47
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are part of a link farm designed to improve search engine rankings. One prominent link, 'https://ttraff.ru/pify?keyword=ghatna+chakra+history+pdf+free+download+in+english', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious content under the guise of providing a free PDF download.

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.ru/pify?keyword=ghatna+chakra+history+pdf+free+download+in+english
    • http://files.theoverflowingbookshelf.com/uploads/1/3/1/8/131856212/kobugebufumanefufi.pdf
    • http://files.harrisendofthetrailranch.com/uploads/1/3/1/4/131407802/1987111.pdf
    • http://nodupe.libyauprisingarchive.com/uploads/1/3/1/3/131380213/vumezu.pdf
    • http://files.ervinracing.com/uploads/1/3/2/8/132814544/7763555.pdf
    • https://cdn.shopify.com/s/files/1/0428/7964/7903/files/watch_fifty_shades_darker_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/5003/2549/files/47613315603.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6348/files/tica_a_nicomaco_aristoteles.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/59498960493.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/wexovunudepaderenasili.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8770/files/nurosubewodajavob.pdf
    • https://cdn.shopify.com/s/files/1/0438/5295/5810/files/asbabun_nuzul_surat_al_mulk_ayat_15.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5616/files/suzimokagapejofenejipisil.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/fipifetobitobiletoxavono.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/womil.pdf
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/jelopowunemojijanukano.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_off00006132.bin
f96afdd7113c927e449693ad2c83c153b03f387da29d6939a06f22344d557215
pdf-font-stream PDF embedded font (sfnt) at offset 0x6132 5704 bytes
font_01_sfnt_off000074b5.bin
d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
pdf-font-stream PDF embedded font (sfnt) at offset 0x74B5 3720 bytes
font_02_sfnt_off00008018.bin
23e0dbaa3005d3d8040dbeb4432451ede6d6c99061f13f2411d5adf87d971843
pdf-font-stream PDF embedded font (sfnt) at offset 0x8018 10120 bytes
font_03_sfnt_off0000a302.bin
1fc8ecb2f51d189bb02d769c0a7cb985316d0a81596020f3a51d21c753491a2c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA302 10348 bytes