Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec044d6bade01337…

MALICIOUS

PDF

60.3 KB Created: 2020-09-17 08:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f55b1862790017b1fe4633792ac81d5 SHA-1: 65caeaebcd89e67a3e41fdb506c3fe4c9f4df982 SHA-256: ec044d6bade0133781aa3f6de03677dba523edd422849bf379bb73dd1a7651bb
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.me/wix?keyword=geometry+polygons+worksheet+answer+key, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious infrastructure under the guise of providing a worksheet answer key.

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.me/wix?keyword=geometry+polygons+worksheet+answer+key
    • http://xapuniwe.kathyschipperart.com/uploads/1/3/0/7/130776054/6a3f0874fd.pdf
    • http://files.hihatdesign.com/uploads/1/3/1/4/131483491/dolex.pdf
    • http://files.gs-cc.org/uploads/1/3/0/9/130969573/favize_rorowifunomeg_vikavar_guroz.pdf
    • http://files.liftingheartswiththearts.org/uploads/1/3/0/8/130814283/1117369.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/mefupuwazow.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9736/files/clash_of_clans_thunderbolt_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/1358/7623/files/cloud_nine_caryl_churchill.pdf
    • https://cdn.shopify.com/s/files/1/0435/5063/8241/files/roblox_modded_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/8414/5049/files/89583069207.pdf
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/19771474208.pdf
    • https://2a03864f-fcb2-44a7-a14a-9dd25c652e0e.filesusr.com/ugd/738632_bbd88280491348f5b1130114d3ba1567.pdf?index=true
    • https://3f9f87fb-ecf0-42b0-bf23-13abdd3cdfe9.filesusr.com/ugd/ce14f3_4c7d0b54177749cb81140216c90039f9.pdf?index=true
    • 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_off00009608.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9608 2828 bytes
font_01_sfnt_off0000a002.bin
33374cd581eb9ba0561e51334aa872e41d3d5317da3ec47c2d68f630697f1a0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA002 5264 bytes
font_02_sfnt_off0000b1d9.bin
2616cb3f3d038fed207fcb55a6b8f5d3537a179653977eb049f34696ef88e540		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D9 9908 bytes
font_03_sfnt_off0000d3aa.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AA 4324 bytes

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