Malicious PDF — malware analysis report

Static analysis result for SHA-256 9440dbafe6f4c312…

MALICIOUS

PDF

40.7 KB Created: 2020-08-03 09:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c165f27f47b4453752af5fa0e7822c48 SHA-1: cb10978725ba6dbe89226027eb7300f1d5c871a7 SHA-256: 9440dbafe6f4c312f4a9cca7546fc98f5a8fe22d16c9946dc87b64ab75022ce7
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Abas ii manual pdf' and the malicious URL, suggesting a lure to trick users into downloading further content. The presence of numerous Shopify links indicates a link farm strategy to obscure the malicious redirector.

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.com/pify?keyword=abas+ii+manual+pdf
    • http://files.ultrafitpersonaltrainingstudio.com/uploads/1/3/1/1/131164202/4369120.pdf
    • http://files.baxterwoodsfriends.com/uploads/1/3/1/3/131384470/ea4f4ad140a843.pdf
    • http://files.operationezra.com/uploads/1/3/0/9/130968947/1cd1c6cf2accf.pdf
    • http://files.capoeira-aca.com/uploads/1/3/0/9/130969166/3419903.pdf
    • https://cdn.shopify.com/s/files/1/0435/6354/8833/files/50102894657.pdf
    • https://cdn.shopify.com/s/files/1/0434/5970/7037/files/xijafomudaxarijexi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/46244372869.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/71431523617.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/velokiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tovunegorudakumuwi.pdf
    • https://cdn.shopify.com/s/files/1/0438/6550/5952/files/6305426712.pdf
    • https://cdn.shopify.com/s/files/1/0434/5695/4518/files/49990198042.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4452/files/resasobevupikerafiba.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_off00005447.bin
843ca8d0026f13f8ae20c0ae102d1e023c94c2f578f1aa4656c02e43f2bbbbfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5447 4796 bytes
font_01_sfnt_off0000645e.bin
5707cfe2f6fdfdffce1ddee0b85e626cf6b39cd1ba1c35cc9a00c83561fd46f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x645E 10792 bytes
font_02_sfnt_off00008853.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8853 4324 bytes

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