Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be78dac5dddae75…

MALICIOUS

PDF

56.5 KB Created: 2020-08-08 14:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1925f7ec1bb1de1fa46f65672ab0fe02 SHA-1: 503445bec25f83076ad5e41a61f4787dd8c18738 SHA-256: 0be78dac5dddae75bee45c66b9f8abc6465bb5d34a17e307bdae9fe5c94e56d3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains references to URLs that appear to be part of a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier 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/wb?keyword=2020%20manual%20transmission%20cars%20canada
    • http://files.markhamroofingservices.com/uploads/1/3/1/3/131383283/dawavekuzavulaz_gesiwe_jofiraripovi_parisikola.pdf
    • http://files.photostars.ca/uploads/1/3/0/9/130968943/9d227515dcbc4ca.pdf
    • http://files.montanapta.org/uploads/1/3/0/8/130874055/xolisamo-jalezaxowasazub.pdf
    • http://zubexe.thestringninja.com/uploads/1/3/1/4/131406086/wukudomapivovi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0172/4577/files/5375866905.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/welibusonitu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/zalenigukazitapofepu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/7600077746.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.pdf
    • https://cdn.shopify.com/s/files/1/0431/2095/1450/files/supabolomavovurosulat.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/98782256554.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8274/files/program_direct_tv_remote.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/advice_and_advise_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0438/2821/5968/files/boccaccio_decameron_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0435/6718/6079/files/top_reader_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5792/files/kosakadaxulukapanupan.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/18910824800.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_off0000937e.bin
b5cb6532cc5900f81bc78f927a42863e2eedcae109e523a164cff40f478509c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x937E 5028 bytes
font_01_sfnt_off0000a45b.bin
ef190816e5342a7e8d43a7103fc7c17f12bc7dde91d54d37141f4620ac87b653		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA45B 10048 bytes
font_02_sfnt_off0000c6b8.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B8 4324 bytes

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