Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff86f21f6c06c84…

MALICIOUS

PDF

46.6 KB Created: 2020-08-11 20:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac4b70bb59f5bc352bd0ff635c7d9fee SHA-1: a635f5587b731ece2c88ff80c811ca17aa53f13b SHA-256: 8ff86f21f6c06c849428c0d4990fc083f267d4d464de8ac6b561429783a53638
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=printable%20inspirational%20quotes%20for%20students%20pdf'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'printable inspirational quotes for students pdf'. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on cdn.shopify.com. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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.cc/wb?keyword=printable%20inspirational%20quotes%20for%20students%20pdf
    • http://larefa.walkinbeautyspaandwellness.com/uploads/1/3/1/6/131607062/1564285.pdf
    • http://files.explorequeretaro.com/uploads/1/3/1/0/131070375/1ca1e7e2294.pdf
    • http://netixum.nomadicamerica.com/uploads/1/3/0/7/130740434/vukefep.pdf
    • http://files.longsightnursery.co.uk/uploads/1/3/1/6/131606206/1600284.pdf
    • http://dekafen.rqgenesis.co/uploads/1/3/2/6/132681394/benonufiniratigelon.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/xedewezibuwuvawuxixigew.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/ashrae_standard_183.pdf
    • https://cdn.shopify.com/s/files/1/0430/9234/4999/files/72846202843.pdf
    • https://cdn.shopify.com/s/files/1/0433/4092/3048/files/54240310672.pdf
    • https://cdn.shopify.com/s/files/1/0428/7610/8956/files/zijuriwogisegerajisara.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9675/files/handball_bundesliga_spielplan_18_19.pdf
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/belodeloluxikuzozijufurik.pdf
    • https://cdn.shopify.com/s/files/1/0434/0288/7322/files/newiliginovuwirali.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/67622504084.pdf
    • https://cdn.shopify.com/s/files/1/0446/6117/8521/files/office_mac_product_key_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2704/6298/files/13950752766.pdf
    • https://cdn.shopify.com/s/files/1/0431/5290/0250/files/6922512773.pdf
    • https://cdn.shopify.com/s/files/1/0430/9522/8565/files/14827782708.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31492874922.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_off00006abd.bin
1e4ddb0548fe05a423b1ec8141765f3079b5049b788296aab831ed1ccdbec18d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABD 5184 bytes
font_01_sfnt_off00007c4e.bin
42f367773c4ff0fd9095abe91f3d3b59a316de0698f6a1fb78aef877bdc865a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4E 10120 bytes
font_02_sfnt_off00009eee.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EEE 4324 bytes

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