Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad5e9db942c6b0c…

MALICIOUS

PDF

46.6 KB Created: 2020-08-10 04:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09c568242e101c7dc66a2eb37edcffca SHA-1: 92d9f9f6fd9570f30d20a25247a2a74a4c7cb357 SHA-256: 2ad5e9db942c6b0c738efa6a90480b17839279fcd4fe7b65d846c8cb885f13f4
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a link farm or redirection tactic. The primary malicious IOC is the redirector URL, which likely leads to a phishing or malware distribution site.

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=ceratocone+diagnostico+pdf
    • http://files.reisbordsclass.com/uploads/1/3/1/3/131378776/566a7f3e4997f7c.pdf
    • http://files.abamericanhistory.com/uploads/1/3/2/7/132712323/tugilanes-wegudir-powubufuzumu-zexakemafuj.pdf
    • http://files.vegasvillains.org/uploads/1/3/2/7/132741169/sugis-liwoke.pdf
    • http://jevusiti.ruffworldtraining.com/uploads/1/3/1/4/131452883/somego-dumofa-tutakulizo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/xadixasanabadivotikofuxan.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/lineperikerapasa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.pdf
    • https://cdn.shopify.com/s/files/1/0440/2357/8789/files/poulan_pro_bvm200.pdf
    • https://cdn.shopify.com/s/files/1/0428/3816/3623/files/papep.pdf
    • https://cdn.shopify.com/s/files/1/0434/4925/4048/files/98579416001.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/experience_human_development_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/6818/6024/files/rajasthan_patrika_bikaner.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/pofoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/2794/5889/files/tomtom_mydrive_connect.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/minurodukoragavila.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_off00006ac2.bin
a83b68b84e48eed613f0e3b6e087a59a883dc79566dbe9a979cf137e08b0f256		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC2 5104 bytes
font_01_sfnt_off00007c2d.bin
5aad79fdb85020a681e7bd681a5ed5b3c2859295d381b3a2bddb1bb8f5edf123		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2D 10356 bytes
font_02_sfnt_off00009de9.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE9 4324 bytes

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