Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab16e4ccae90d472…

MALICIOUS

PDF

48.0 KB Created: 2020-07-09 01:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73986f44e3423640b30e84806f4f4edf SHA-1: 5fe3ad522c038cdb51422ccaa592ec669c3e729d SHA-256: ab16e4ccae90d47201b389646454cf9f7f78c6b48f7364451a5c06851cbd19fa
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 external PDF files, suggesting a link farm or redirection scheme. One prominent URL, https://ttraff.ru/, is identified as a malicious redirector. The document body, while containing seemingly educational text, is likely a lure to encourage users to click these malicious links. No scripts were extracted from this sample.

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/wb?keyword=important%20questions%20for%20class%2012%20cbse%20chemistry%20chapter%20wise%20pdf
    • http://files.guerasboutique.com/uploads/1/3/1/6/131636972/vuroluzelax.pdf
    • http://files.movefreelet.com/uploads/1/3/1/8/131856950/siranojez.pdf
    • http://files.carolglasser.com/uploads/1/3/0/7/130776247/e07be82.pdf
    • http://files.changingfutures.org.uk/uploads/1/3/1/6/131606087/mufegesitawiko-matuwomap-xivekun-vokozufeletefuz.pdf
    • http://files.hreynoldsdesign.com/uploads/1/3/0/8/130814423/xurojibavef-fupufubulon-lowenamov-lomutirinimov.pdf
    • http://files.just-verandas.com/uploads/1/3/1/3/131379045/xobuxisedujus_wekabod.pdf
    • http://files.brandonmoorecomposition.com/uploads/1/3/1/4/131438766/muxigem.pdf
    • http://files.evanzappel.com/uploads/1/3/1/3/131384552/1e5d1f14ea.pdf
    • http://files.cfhsperformingarts.com/uploads/1/3/0/9/130969830/4446236.pdf
    • http://files.yourlocalartists.com/uploads/1/3/2/7/132712251/fujaviro_gorivegogasol.pdf
    • http://files.craigleacapetown.com/uploads/1/3/0/7/130775846/90bc7de4.pdf
    • http://files.statebirdtogo.com/uploads/1/3/2/7/132710687/a1b067.pdf
    • https://diwegola.files.wordpress.com/2020/06/36472710356.pdf
    • https://jofuguxidag.files.wordpress.com/2020/07/34170336404.pdf
    • https://satebelofoxo.files.wordpress.com/2020/06/34218251782.pdf
    • https://mulanarojed.files.wordpress.com/2020/06/finikalukurigejag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mirizopenifipometetotagoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.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_off00006656.bin
5d1e5072afcaba5aaeeeba132511d3da67e38489e77674a54ae5571f550e1988
pdf-font-stream PDF embedded font (sfnt) at offset 0x6656 5856 bytes
font_01_sfnt_off00007a24.bin
8058cf7e31bd20b0af3be1eb710d84425e6f2270808a92bd9d4359a777d59ea7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A24 10288 bytes
font_02_sfnt_off00009d31.bin
0d7a92828fb34c46272def7401d297891c72c028a4bdfa4d2814ce18bde6b281
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D31 16164 bytes