Malicious PDF — malware analysis report

Static analysis result for SHA-256 b99367f669dc5180…

MALICIOUS

PDF

48.4 KB Created: 2020-08-08 15:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03bbf23d850f14d6e876b601847c5fc3 SHA-1: 6bc86e6281a3a6478c735a5ecf473eff527a149b SHA-256: b99367f669dc51806a8e6c644d292bc35fafd82957389e6431defc7b9ae2f55d
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical link directs to 'ttraff.com', a known malicious redirector. The document body, though heavily obfuscated, contains the same academic-themed keywords found in the malicious URL, indicating a lure to trick users into clicking the malicious link. The primary intent appears to be redirecting users to malicious infrastructure.

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=examen+regional+francais+la+boite+a+merveille+2020+pdf
    • http://files.jessynolan.com/uploads/1/3/0/7/130739621/29f54c8b.pdf
    • http://latovixim.resultsvisualized.com/uploads/1/3/0/7/130775971/4348463.pdf
    • http://files.cvhsaa.org/uploads/1/3/1/8/131856173/3581553.pdf
    • http://files.flashfoto.com.au/uploads/1/3/0/9/130969489/60f779.pdf
    • http://files.brickchurchstjames.org/uploads/1/3/1/4/131454345/jaxome.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/wupibigejomotor.pdf
    • https://cdn.shopify.com/s/files/1/0430/3909/6986/files/tekulizutokuxemavani.pdf
    • https://cdn.shopify.com/s/files/1/0436/1512/5662/files/ladojeliwerakeveriga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/66075973432.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6488/files/28106148159.pdf
    • https://cdn.shopify.com/s/files/1/0450/2352/7070/files/estructura_de_materiales_compuestos.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6556/files/the_shadow_throne.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/tigakubetenumiruxelebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7167/6314/files/25405923859.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/sotepekixavapab.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_off00006105.bin
e362a1793110c4274dfc64ca14142a24cc5aa48d3d7aeab50eab732800f60474
pdf-font-stream PDF embedded font (sfnt) at offset 0x6105 5972 bytes
font_01_sfnt_off00007556.bin
b44c45b9f82d106b7d88f1db2b338850b4c66e7f1bd81032c83a33373acf6e85
pdf-font-stream PDF embedded font (sfnt) at offset 0x7556 12264 bytes
font_02_sfnt_off00009b96.bin
65f5d31a488aba5a3fc4be3a1ffa4aff022047a847e030d5d4a7b4b4655df03a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B96 16516 bytes