Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9c45704f14f946…

MALICIOUS

PDF

48.7 KB Created: 2020-08-18 14:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5341d704d64d4dc3a865755b434e50e3 SHA-1: 282181413ab8be3a208758386ec540fe89498f5f SHA-256: 8c9c45704f14f946473d62ed4e93efabe58bfa50fa0af1c04915d3d3f7c265b4
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to malicious infrastructure. Additionally, 'PDF_SEO_LINK_FARM' suggests a large number of links, likely to manipulate search engine results or to host phishing content. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to educational materials.

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=common+core+sheets+dividing+fractions
    • http://files.tarrellrodneycampbell.com/uploads/1/3/0/8/130874265/vetokozupafuwuwo.pdf
    • http://xazap.salsaritaslexky.com/uploads/1/3/1/4/131437601/firazadotowap_ratusoxurenavif_didokutazose_buwobapaxafuk.pdf
    • http://files.indestructibleglowbaits.com/uploads/1/3/1/4/131454024/982a977ae.pdf
    • http://misajane.mhwclub.com/uploads/1/3/1/3/131383483/2215718.pdf
    • https://cdn.shop
    • https://cdn.shopify.com/s/files/1/0438/5928/0022/files/chaupai_sahib_with_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7576/files/mumipezojegamitapo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0754/8326/files/95911460949.pdf
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/vizelilelupujonojokix.pdf
    • https://cdn.shopify.com/s/files/1/0440/7505/7302/files/dukofe.pdf
    • https://cdn.shopify.com/s/files/1/0436/1024/3230/files/quiznos_catering_menu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/d_link_dir_655_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8518/5702/files/campbell_biology_test_bank.pdf
    • https://cdn.shopify.com/s/files/1/0432/7168/4252/files/77754730426.pdf
    • https://cdn.shopify.com/s/files/1/0433/0592/6809/files/fimal.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/catalogo_ngk_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/9412/1379/files/90309959843.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0729/files/1331310954.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_off00006162.bin
51474e0ebec430047ad78affae2bc0ccf50a0b76714f329d872f17cbe2ca3fa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6162 5368 bytes
font_01_sfnt_off00007374.bin
f70e5b3f7dc93a2f60727bdac268a016b14c0173ca631c7038038158654df00c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7374 1704 bytes
font_02_sfnt_off00007bf5.bin
a11611806cd11163bcf81fe146e9dede9195e1b7707316c086f4af806f274777		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF5 10212 bytes
font_03_sfnt_off00009eff.bin
49f5dbd872ac4f4057ac265a5e2d4c1865afd07712219480748d744813068891		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EFF 16268 bytes

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