Malicious PDF — malware analysis report

Static analysis result for SHA-256 0efbbd6fc8f401b1…

MALICIOUS

PDF

46.1 KB Created: 2020-08-01 17:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c50013723dd944676587a5105c0dbaca SHA-1: e50ed958476c1ffcf36d137ccb9cdb1f32d7ae8e SHA-256: 0efbbd6fc8f401b1cee93ab154644392365a8a366dda27600252d014613d56c0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to malicious content. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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.cc/pify?keyword=coolmoviez+hollywood+movies+2016
    • http://files.bryanmierauphotography.com/uploads/1/3/1/3/131384424/88a26944d5.pdf
    • http://files.wahmee.com/uploads/1/3/2/6/132696063/gakeve.pdf
    • http://files.henryhomes.site/uploads/1/3/0/7/130776828/kixirusi_kinopaxo_bokikomowi.pdf
    • http://files.callstevekapur.com/uploads/1/3/1/4/131411539/2160806.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8423/4396/files/14755628444.pdf
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/monoprice_select_plus_cura_settings.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6333/files/jamosiligosatidesufutid.pdf
    • https://cdn.shopify.com/s/files/1/0431/7541/1872/files/dobagosukeroravokajometu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1624/9767/files/85018567871.pdf
    • https://cdn.shopify.com/s/files/1/0433/3014/2363/files/vexufivixe.pdf
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/51568046766.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/92766869401.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3909/files/67685972502.pdf
    • https://cdn.shopify.com/s/files/1/0430/9942/2881/files/63752096617.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/43148063432.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000642c.bin
54005c386ef926b746cf752b7195a25a374e22e6e0b0be6c84ebfaec4b2ed0dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642C 5168 bytes
font_01_sfnt_off000075e7.bin
3ad33f7d436c04b3506ae7201cd1c82e251ac2cb9ea1e0a554d67ea425d036c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E7 12060 bytes
font_02_sfnt_off00009d61.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D61 4324 bytes

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