Malicious PDF — malware analysis report

Static analysis result for SHA-256 daed3eb007d8b1fa…

MALICIOUS

PDF

38.1 KB Created: 2020-08-18 15:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4dd77b33667301e6678f47025eef062 SHA-1: 43696213838b3ddea59c9de6768db8b42da5ff64 SHA-256: daed3eb007d8b1fad6451312d00ca9969a00257ecd2ce6b7ce12a8b793ce04f2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is presented within the document body as a worksheet. This indicates a social engineering attempt to drive traffic 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=classifying+quadrilaterals+worksheet+year+4
    • http://files.hopehousekanazawa.com/uploads/1/3/2/6/132695531/xodotarisupag.pdf
    • http://files.clothesforallweather.com/uploads/1/3/1/3/131381109/77bc4407ce25e.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/angioedema_treatment_guidelines_uk.pdf
    • https://cdn.shopify.com/s/files/1/0439/0522/0763/files/62695427727.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38804475130.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/fabaluwuwajaviwasuwanag.pdf
    • https://cdn.shopify.com/s/files/1/0433/1021/9432/files/20030282764.pdf
    • https://cdn.shopify.com/s/files/1/0433/1556/0616/files/78196816481.pdf
    • https://cdn.shopify.com/s/files/1/0444/4097/7574/files/timidez_y_ansiedad_social.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6568/8743/files/37936737318.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/50449959669.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/wotetolajesamodakuxopun.pdf
    • https://cdn.shopify.com/s/files/1/0445/8790/9284/files/2020_calendar_2020_printable_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/2299/9964/files/askep_anemia_defisiensi_besi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/82960118523.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056fb.bin
b71c705b588c3d5571a3a21d91e49998d8665183a4f8bcf59c2140cc1df5798c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56FB 5548 bytes
font_01_sfnt_off000069e8.bin
72c5853c5581f473e2818efce02eab5f4788cb3b0139e0976b4e131b2ba013a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E8 9756 bytes

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