Malicious PDF — malware analysis report

Static analysis result for SHA-256 126b5094270ffb1a…

MALICIOUS

PDF

60.6 KB Created: 2020-08-10 09:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48a8b97a9fe8c959a6c83b71d7594461 SHA-1: bcf1c94e77b565f38cb10a03e643180ec20e467d SHA-256: 126b5094270ffb1a6efc2bfb8910f51ef330b7ce23bb7f0d57f33b8a9b7cce53
162 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body also contains text and links related to PDF conversion tools, suggesting a lure to disguise the malicious intent. The presence of a 'download button' heuristic further supports the phishing pretext. No scripts were extracted, but the primary malicious activity appears to be redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=best+pdf+to+word+converter+nitro
    • http://files.aakarate.com/uploads/1/3/0/7/130776611/pazoke-gutafirivo.pdf
    • http://files.cesarzamudio.com/uploads/1/3/1/3/131383838/8424967.pdf
    • http://files.middleclassmusings.com/uploads/1/3/1/4/131407552/7942486.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8167/9523/files/20257042503.pdf
    • https://cdn.shopify.com/s/files/1/0428/2544/9628/files/57611208203.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jamitaribigonekadori.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/javapazu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/budgeting_and_budgetary_control_in_manufacturing_companies.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/rorosutudabipagakem.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/dufezomune.pdf
    • https://cdn.shopify.com/s/files/1/0438/1461/7250/files/66969712972.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/53910807509.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/administracion_de_pequeas_empresas_anzola.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86662201832.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/analogias_numericas_ejercicios_resueltos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/poxusulijupidokubeb.pdf
    • https://cdn.shopify.com/s/files/1/0436/1519/1202/files/debekuxamefarunarezisebut.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f54.bin
0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F54 6744 bytes
font_01_sfnt_off0000903b.bin
4b800ed37b2636bb9ed0eb785f143ee98d86ebf0a980fc3b55a64d3bc1da4a25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x903B 5108 bytes
font_02_sfnt_off0000a1c8.bin
1ee76c281b6b61cf224f681ab12434ebb6d27409fa1cd6bc16d30a0d9cddb32a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C8 2208 bytes
font_03_sfnt_off0000abd3.bin
d2ab98c4b06c377bc6fecc922b973e3857ac4c36f1a4e97f8bc3b28cdf0ca93b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABD3 10364 bytes
font_04_sfnt_off0000cf87.bin
354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF87 16036 bytes

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