Malicious PDF — malware analysis report

Static analysis result for SHA-256 468e27222ebe0fb1…

MALICIOUS

PDF

80.0 KB Created: 2020-09-16 20:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97eb316703e8e7adbd789ce3efc18ef5 SHA-1: ae3dffbb5f470fd0497d3715dfd43073416145f8 SHA-256: 468e27222ebe0fb1295125bed7318e6635ccc656b389b20b7de4a14ee85f55fe
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=2018+cpc+study+guide'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of outbound links, with one example being 'http://files.moonwalksdetroit.com/uploads/1/3/1/1/131164009/romitofer.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the text '2018 cpc study guide' and the malicious URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=2018+cpc+study+guide
    • http://files.moonwalksdetroit.com/uploads/1/3/1/1/131164009/romitofer.pdf
    • http://files.joshhayeswriter.com/uploads/1/3/1/4/131483955/kakukepewof.pdf
    • http://guvube.heswallsquash.com/uploads/1/3/1/0/131070306/2765361.pdf
    • http://pexatu.shajaceramics.com/uploads/1/3/1/8/131871740/4631657.pdf
    • http://sogowa.reciprocalminds.com/uploads/1/3/1/4/131482995/7049471.pdf
    • http://megeveji.clintholmesmusic.com/uploads/1/3/1/4/131407102/835124f1bc45.pdf
    • http://wamiko.areabrooklyn.com/uploads/1/3/1/6/131637649/puxed_kexujewe_roduv_jamudutezibe.pdf
    • http://files.louiserosejohnson.com/uploads/1/3/0/7/130739450/37c16d70272.pdf
    • http://files.leahmichelleart.com/uploads/1/3/1/4/131453907/ginavuf.pdf
    • http://files.fairgreenoutreach.com/uploads/1/3/0/9/130969708/kilunan-bideradenoledob-fezafexivadad-zagufep.pdf
    • https://011a2ca8-9afe-445b-9277-a00759f3a9c6.filesusr.com/ugd/681527_7b79f4feff914790aae238f10a650ba9.pdf?index=true
    • https://2832d55e-8682-443e-a788-9f7183a941af.filesusr.com/ugd/dcc11b_70f2553d3e19477993748c6ac85046f0.pdf?index=true
    • https://bbb6adaa-e996-4a76-91fe-dac8fba7fc9c.filesusr.com/ugd/e948c1_6cfdd88809a247d398c6a9fd98660ab8.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0476/7957/0086/files/ramakirorupubamikobepop.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9686/files/vimedibukejimetasezutuwul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/89156373009.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/naxisujitu.pdf
    • https://cdn.shopify.com/s/files/1/0440/7223/9269/files/colored_acrylic_sheets_canada.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_off0000f20a.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF20A 2828 bytes
font_01_sfnt_off0000fc04.bin
2a7c7b40f8bb8748292d6cde9ed66b887aea24c1832235baa047d5a8e8a60013		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC04 5428 bytes
font_02_sfnt_off00010ea4.bin
3df63cf75d840feac68d4b620baf7fbbb2ab2293276dc0b03b25e66dcd57b3f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA4 10484 bytes

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