Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2649ae991485cdd…

MALICIOUS

PDF

44.0 KB Created: 2020-08-23 12:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58d064b7864bb0c7c6be63b2997863ff SHA-1: 65c0df31431838ceed0e31d5e625e72c42c403dd SHA-256: b2649ae991485cddc7600bb8493246b62dfb3e393cef990a9f13db2cd8461b21
120 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 'ttraff.com'. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a link farm or lure for users searching for study materials. The primary malicious URL is likely used to redirect users to a phishing page or a malware download site.

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=banco+de+preguntas+ser+bachiller+2018+pdf
    • http://files.barbaralaing.com/uploads/1/3/1/4/131437983/dovageli.pdf
    • http://files.lifereachbirth.org/uploads/1/3/1/4/131407547/0a1bc662fd.pdf
    • https://cdn.shopify.com/s/files/1/0428/9373/8143/files/cambridge_young_learners_placement_test.pdf
    • https://cdn.shopify.com/s/files/1/0437/1369/1799/files/31433741276.pdf
    • https://cdn.shopify.com/s/files/1/0433/4334/7877/files/bizijijet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0132/3420/files/64669718609.pdf
    • https://cdn.shopify.com/s/files/1/0429/7388/8671/files/53368122066.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/19075726489.pdf
    • https://cdn.shopify.com/s/files/1/0437/1483/8679/files/pokenesonubiva.pdf
    • https://cdn.shopify.com/s/files/1/0431/7741/0720/files/nolivukavigolobatenegel.pdf
    • https://cdn.shopify.com/s/files/1/0436/9098/3574/files/rafutuxiwitozezuwaridafix.pdf
    • https://cdn.shopify.com/s/files/1/0433/2411/3049/files/ap_grama_sachivalayam_anm_syllabus_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1683/8558/files/61164133298.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_off00005a25.bin
5a740f9e240ccad124a6eefa7683cc4098c3b66fd90619156446f55847cbc1ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A25 6008 bytes
font_01_sfnt_off00006e80.bin
aff00244649a4fe4c11cb5e1371c8fb1786bbe8eafac8b11697ddd91b7c27d3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E80 11384 bytes
font_02_sfnt_off0000938a.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x938A 4324 bytes

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