Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fda44450bc199be…

MALICIOUS

PDF

45.4 KB Created: 2020-08-10 01:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5b4283206560aea72d750021ede7ec6 SHA-1: 7647b21c4a73c2728467cf00463907f4ce3fcf4e SHA-256: 8fda44450bc199be63ff37f433aea55d12e9967b240ba213004c315dafdc7743
152 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 pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack vector appears to be social engineering, tricking users into visiting a malicious site under the guise of vocational guidance.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=define+vocational+guidance+pdf
    • http://rutesevod.milwaukeetoireland.com/uploads/1/3/1/4/131438216/1446916.pdf
    • http://vuram.ermurrowhs.org/uploads/1/3/1/6/131606490/pazogiteje.pdf
    • http://files.ultimatwiremachines.com/uploads/1/3/0/7/130775462/35eeac5d08934d7.pdf
    • http://files.circleofwealthgroup.com/uploads/1/3/1/8/131860204/ruligojibo-wevizivuji-zovutujinig-tivoloso.pdf
    • http://files.felonmentorship.org/uploads/1/3/1/4/131438571/2f8f110.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/robevigemopakid.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/gaboroxamo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tukesameb.pdf
    • https://cdn.shopify.com/s/files/1/0432/6182/1092/files/96186290389.pdf
    • https://cdn.shopify.com/s/files/1/0450/7769/2581/files/caracteristicas_de_estilos_de_aprendizaje_visual_auditivo_kinestesico.pdf
    • https://cdn.shopify.com/s/files/1/0436/9114/7417/files/zegibimanavipobox.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/78590956368.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/atv61_programming_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7020/1760/files/10998863303.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/63196995721.pdf
    • https://cdn.shopify.com/s/files/1/0429/0428/9439/files/52092019978.pdf
    • https://cdn.shopify.com/s/files/1/0434/1510/9794/files/zedak.pdf
    • https://cdn.shopify.com/s/files/1/0430/8018/8058/files/wefunefekopesusevag.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_off000074f5.bin
3c24b27d3d8e5fe4390e2ce0c830371b5528852274f213553dbbceb2c7f6a6c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F5 5108 bytes
font_01_sfnt_off0000867f.bin
e4cb80d5eea0bc28d86468bb7428ad0c4e11559778bde41e730781afa2fd9e9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x867F 9912 bytes

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