Malicious PDF — malware analysis report

Static analysis result for SHA-256 61210bc9ca0c376a…

MALICIOUS

PDF

34.0 KB Created: 2020-08-11 22:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeb854651663fa218373286507e47169 SHA-1: d10130ef51d778999025fa0d24e7e83c3c3a5ef8 SHA-256: 61210bc9ca0c376a72131df33a5db9007275af9f73dffba6ed8d82d7242879f9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=chandra+prakashan+assam+tet+book+2020+pdf'. The document body also contains this URL, suggesting a lure to trick users into clicking it. The presence of numerous links and the redirection to malicious infrastructure indicate a likely attempt to distribute further malware or engage in phishing.

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=chandra+prakashan+assam+tet+book+2020+pdf
    • http://files.carboanalytics.com/uploads/1/3/2/7/132710732/908b4.pdf
    • http://wepuworik.startupinfluencer.com/uploads/1/3/2/6/132682883/6453665.pdf
    • http://files.lsbdacademy.com/uploads/1/3/0/9/130968950/3b0b714bc9a1f.pdf
    • http://vufugad.ptaccounting.net/uploads/1/3/2/6/132696323/wavulus_felariwawasi_vepubusakelilej_sitesumi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5657/9228/files/dovarexalijugisoto.pdf
    • https://cdn.shopify.com/s/files/1/0448/2914/7293/files/84574188656.pdf
    • https://cdn.shopify.com/s/files/1/0435/7462/4419/files/22707715488.pdf
    • https://cdn.shopify.com/s/files/1/0428/2309/0343/files/97585445445.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/zoraxebovoniwiritorok.pdf
    • https://cdn.shopify.com/s/files/1/0438/3798/0834/files/tamasozowajiririmurijuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68736518606.pdf
    • https://cdn.shopify.com/s/files/1/0450/2949/0838/files/formulaire_attestation_pole_emploi_vierge.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/666062085.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/seiken_densetsu_3_classes.pdf
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/pekevokagejaxusaneb.pdf
    • https://cdn.shopify.com/s/files/1/0435/0348/5092/files/gafuxufu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5838/8374/files/renuv.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000479d.bin
7c5889c8b343609509c33920ebc373b9d3e26bdb935a55d18e6ab448632a13c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x479D 5632 bytes
font_01_sfnt_off00005a8b.bin
6e3cc9fa9922baba2d34d257a5b6a0ef8f9f399733d7b93cf14b9fa799d4168c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8B 9416 bytes

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