Malicious PDF — malware analysis report

Static analysis result for SHA-256 07223c5362d232e6…

MALICIOUS

PDF

47.7 KB Created: 2020-08-21 11:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d6ba6f857cedebe59357b8c01797710 SHA-1: ddd4199e5a697f11bfb36695ea0c2e8cb4ad7671 SHA-256: 07223c5362d232e670f550cffb174da0510539aa529d8624dbf3c6d4a5ff32d6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, suggesting an attempt to trick the user into clicking it. The ML classifier also strongly indicated maliciousness.

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=latest+worship+songs+2018+free
    • http://jefugugel.candodogs.com/uploads/1/3/1/3/131384171/devexuliliwuvisisoja.pdf
    • http://files.livingourpotential.org/uploads/1/3/0/7/130775808/zogadunobumaza.pdf
    • http://vebinip.prospectartworks.com/uploads/1/3/1/4/131437044/9512ea3610e266.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/6467/1906/files/mugitugiridosubodokegin.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/kebajenozofixuguvano.pdf
    • https://cdn.shopify.com/s/files/1/0434/5679/0681/files/basics_of_solid_state_physics.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/derub.pdf
    • https://cdn.shopify.com/s/files/1/0432/0264/2075/files/togojopajixiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2255/files/edema_pulmonar_en_perros.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/wudesiretutofejepofobipaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3980/files/60544216606.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7727/files/kiefer_sutherland_net_worth.pdf
    • https://cdn.shopify.com/s/files/1/0438/3493/3408/files/adobe_audition_min_ph.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2391/files/jaxonokod.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059dd.bin
2f153af3bba21732dafbc78bf32aaf1a6503f0a12b75a0069d5813ec39c1e795		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59DD 5472 bytes
font_01_sfnt_off00006c83.bin
78f3ddb0fe89586d1f5a234a64779f62f8d9fbd35b8bc31bab414cdc83bf27d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C83 9956 bytes
font_02_sfnt_off00008ee0.bin
9352d416d3fc38e0cde715a6fbdb9492e961298b7af78ef2a950ce7bf6ec641e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE0 16076 bytes
font_03_sfnt_off0000a387.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA387 4324 bytes

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